No it’s not. Time zones are a source of incredible confusion for programmers and are the cause of countless computer bugs that affect billions of people.
If we all used UTC time, you’d get used to it. You’d simply get up at xx:00 and have lunch at yy:00, etc. The numbers we use now (like 6 or 12) are completely arbitrary. You would get used to your day cycle using different numbers and the next generation would think literally nothing of it.