I guess we live in a world where things got invented by humans at some point in time, while you live in a world where some higher power just baked 12h clocks into the fabric of reality for humans to just discover. Yeah, I am not sure how we can easily find common ground.
We are asking questions about the world and its rules to learn, study and question them, you demand acceptance and unthinking submission to it.
Not really 11:00 AM +1h becomes 00:00 PM, and vice versa. PM and AM are different prefixes/systems/units. Much simpler to understand IMO. 12:00 AM and 12:00 PM would no longer exist, you just convert them from PM to AM or back when you reach them and set the numbers to 00 again.