They do?
I don't remember hating my bike when I was a kid, and I had the cheap kind. I also don't remember it being too heavy or anything. Of course if I wanted to ride my bike, I had to lift the heavy wooden garage door up (elementary-school-age). Kids that I volunteer with all seem weak and have issues that I never had.
There's a parable about helping a butterfly out of a cocoon:
https://paulocoelhoblog.com/2007/12/10/the-lesson-of-the-but...