I think they're focusing on developers, most of which are either planning a move to something else, wishing they could move or have already left.
Personally, what dev related motivation I had to move to Linux disappeared when wsl got decent.
That said, 90% of my work is still in windows proper, so any universal tool like git related needs to support it to be any use.
And if not me, anyone else you're collaborating with.
I think they're just using FUSE to make it work but don't quote me on that part.
If you operate fully inside of WSL (either via X11 or in a terminal) it's a pretty good experience.
Sure, not doubting that, I'm also a developer, and use Windows. But not because I want to, which I feel is a pretty common position to be in, at least around me.