Allah knows the best. He created human beings as the best creation.
Question: If He wanted human to be circumcised then why didn't He make the human circumcised automatically in birth?
Aren't we hurting Him by deforming His best creation?
Muslims are circumcised because Allah has made it part of our deen:
Hadith from Sahih Bukhari (https://sunnah.com/bukhari/77/106):
Allah's Messenger (ﷺ) said, "Five practices are characteristics of the Fitra: circumcision, shaving the pubic region, clipping the nails and cutting the moustaches short."
Your objection is not logical as Allah also created us naked, yet you acknowledge that nakedness is immodest and do not say if Allah wanted me to wear clothes then he must have created me with them.