It is exactly what you’d do if you maximise profits. The general argument against the Apple/Google tax is “think of the small businesses!” They use this argument because no politician wants to be against the small business owner.
Google and Apple understand this well. Since small businesses account for a small % of their revenue, they simply offer a better deal to those small businesses. Now Spotify/Epic Games/Candycrush people will have to argue “but think of the large businesses!” That doesn’t have the same ring to it somehow.
The majority of App/Play Store revenue is protected from government intervention, and profits are maximised. Make sense?