> Epic and Spotify are pushing their own walled gardens, they just want to do it with a bigger profit margin.
There is absolutely no problem with that because it cures the one and only walled garden problem. If they implement a subpar walled garden, it will be up to the users to exercise choice on using them, which they currently can't.
This is the core of the opponent processes of markets. It is irrelevant to demand ideological purity from opponents, what matters is the resulting dynamics their actions create, in this case creating a previously non-existing competition space on iOS app installs.