Makes no sense to me too but there is a vocal minority, as demonstrated when Microsoft removed android app support from windows 11, that use them. It's hard to estimate how many dozens of them there are but I guess it got to be in single digit.
My use case is running Android apps on my Surface Pro instead of having to buy a separate tablet. It works great for my purposes.
I really struggle to see the benefit, android app seem subpar in every way.