It just works. I don't want to have to invest time in making my os work. I want to spend my time on my projects(which I use wsl for)
I totally understand the desire and satisfaction of having complete control over your os but a lot of people just want to be able to do simple stuff like game and browse the web which windows does just fine in my experience.
I'm saying it just works, I didn't say anything about why that is the case.