Why has it been traditionally forbidden to study Islam on your own, and do the reasons apply today?
My thinking is that the only reasons are that you could be misled into false interpretations, however this doesn't seem to apply today where we have youtube, English translations of various traditional books, and so on, all of which serve to ensure that you do not end up misinterpreting what you learn.
Note that this is not about whether learning with a Shaykh is better than doing so on one's own, which is clear (i.e. learning with a Shaykh of course has many benefits you cannot learn on your own), but rather if it is possible to learn on your own.
I think it is definitely possible in this day and age, and Allah knows best.