Personally, I only care about the code. When I say maybe there are people who worry about walled gardens and cloud providers who take ownership of your data, I am not one of those people. That's not what I actually care about. That's not what I do. What I do is code. What I care about is code.
Android is very far from linux desktop. And it is private, its is google services that are bad, therefore we can have things like calyx and graphene os still be private.
Phones is absolutely a valid point these days, IMO OS > web + web browser in terms of what you can get.
MS and google both know what porn you are looking at. What you buy from your PC etc... MS knows how much time you are spending playing games + has screenshots of all your encrypted conversations etc...