Pretty much all answers here should be valid, have an upvote 👍

Another thought, it would be nice if our hair didn’t grow like any longer than an inch or so, where people wouldn’t need regular haircuts or complicated hair styles.

I mean sure, ladies wouldn’t be able to grow their hair out as is fairly common these days, but if our hair always stayed relatively short, it would be perfectly normal, and would save us the hassle of going to the barber.