I think a lot of folks take this path because it's just easier. The fact that I know I can do most of the stuff the same way I always have makes it an easier decision to make. I think there's also, for some people, an ideological component, that is, they're still using UNIX, it just happens to be in a Windows host, and that's easier to accept than come to terms with Windows just being a decent OS on its own merits. (I am not saying anyone in particular in this thread is that kind of person, of course.)
With WSL2 you can go from - I wonder if this would work, do a quick no git checkin no vm no docker quick script, then looks good, let's drop this into git, get a dockerfile going, test on docker then test deploy or start going to production.
And it's all pretty fictionless and you can use your Windows machine still for whatever other desktop stuff you have (which many find easier than getting a linux desktop going especially if you need to interop with a word / excel / microsoft business).
I think Microsoft is finally paying a bit of attention to what developers are looking for. The vagrant / docker on windows solutions were in part providing for this need (windows desktop / linux development). This is also what made MacOS so great (unix/bsd under the hood with a nice gui). Why not bake it in? Linux is open source - you don't even have to license it from someone.