The point is maybe simple if we don't follow the traffic regulation, the traffic would be a mess and in worst case more people would die ... so rules are always needed or necessary. I think this is logical and therefore you may find rules in each religion, mostly ethical rules. In many cases also the local customs play a role and are mixed with those rules.
Now you may find in the Quran itself rules even for dressing (see for example 24:31, 33:33 and 33:59) eating (see for example 2:187 and 5:3) and many dos- and do not (even if all this might not even reach 10% of the whole Quran). As a Muslim I (must) believe that those are God given rules or orders I should follow to live in a good relationship between me and my Creator.
Muslims beside this tried to follow the path of the Prophet Muhammad and the result was a waste collection of so called ahadith (hadiths). Some of the Muslims consider these hadith as God given (based on Quranic statements like this in (53:3-4):
Nor does he speak from [his own] inclination. (3) It is not but a revelation revealed,
but hadith has mostly been collected much later than the Quran, who was scattered as a lot of parts or memorized by many memorizers. God or Allah himself promised to preserve Quran (15:9), but nobody can say the same about hadith, even if there are efforts to separate the wheat from the chaff. So hadith should always be well examined before accepting it, and this means in first place does a single hadith go ahead with the teachings of the Quran! The earlier generations of Muslims did so, they even never memorized a word or a new verse of the Quran until they understood it and applied it in their real life, and so did the next generations with hadith. But the problem with hadith is that with the time hadith fabrication became a big issue, as an orally transmitted word can to some extent be easily manipulated, and many scholars just collected hadith and compiled it in books or transmitted it without (or with only minor) further verification. That's why among sunni's there's a big dispute between the people of fiqh (Islamic jurisprudence) and the people of hadith! For the hadith scholars it took about 3 centuries to start examining hadith again and Muslims do this to some extent and should do it all along.
So before applying a hadith one should use his mind and reflect and examine it. Often common sense is enough for that!
Some real life examples
- In hadith we for example learn that it is strongly recommended to pray in congregation (namely so called fard prayers which are ordered prayers), In the Quran these recommendation doesn't exist, however Quran indicates some situations where this is done (for example in case of war or fear and the call for the Friday prayer come in my mind). Beside this hadith recommend to pray some prayers at home (namely so called nawafil, optinal prayers). Honestly in my experience I seldom find my freedom in a congregation prayer, while once I pray alone I get a deeper feeling of "Communicating with" or "remembering" my Creator.
- There's a hadith statement saying which clearly goes ahead with your "feeling" or "understanding":
The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. (Link to a longer version of this hadith)
I've experienced this in real life anybody who tries more and more to follow strictly some sunnan (plural of sunna or sunnah: the way Muhammad did something or what he ordered or recommended) comes to a point he might "technically" be a straight person, but his behavior and his interaction with people is far away from the teachings of Islam or Quran in first place (some of these people get schizophrenic).
There's even a statement of the Prophet where some sahaba (his companions) ask him something like (I'm here posting the meaning I've concluded before posting a link to the hadith): "we feel next to God and as good people why we are beside you, but once we leave we are afraid of turning away from all of this" ... the Prophet answered appeasing "if you were like this all the time you would be like the Angels (Muslim believe they are infallible), but -as some people say- there's a time for Allah and a time for yourself". (Here's a version of the hadith)
- Unfortunate as already quoted in the other answer people in the last years, decades maybe centuries became more and more superficially religious, that means a beard (for a man) or a scarf (for women) is more important than what is in the heart, praying (in the mosque) more important than just being a good person (even if Allah says "Indeed, prayer prohibits immorality and wrongdoing, and the remembrance of Allah is greater. And Allah knows that which you do." (29:45)), listening to some dramatic or mournful recitation of Quran is more important than reading it (yourself) and trying to understanding and applying it in real-life (even if Allah asks them: "Then do they not reflect upon the Qur'an?" in 4:82 and 47:24). ...
However Quran teaches us in many verses that those people who believe and do good and righteous deeds are promised a reward from Allah.
What makes a good Muslim?
In my opinion this is clearly explained in the Quran. A longer explanation can be found in surat al-Furqan (25:63-77) which is one of my guidelines in life an other longer version can be found in surat al-Mu'minun (23:1-11). For further explanations of the first "guideline" I invite you to read the special part of my answer of this Question: I want to ask God for forgiveness for an abortion
