Not to mention that the transition to Apple Silicon will lead to the total integration of the Mac App Store into the iOS store, so these policies are going to merge at some point and literally apply to general computers too
Why do you think Microsoft bothered with WSL? We know that most Windows users won't do it. It was a developer-attracting move, meant to make it easier to build Windows client applications with Linux server components. Apple benefits from the same thing being offered natively. I can't see them abandoning it, even though it does create a tension between the Mac as a consumer product and the Mac as a developer's tool for iOS.
All of this is still unknown outside of Apple. What is known so far seems to me like it's pointing in the direction of a pretty open macOS and a very much locked down iOS, to satisfy different needs. We'll know more by late fall, I guess.