At the risk of being controversial I think Apple should control the App Store, and indeed I think Google should control Google Play.
These companies spend millions building the infrastructure to manage app delivery etc and trying to ensure apps are safe, why should they not be able to profit from them?
If Netflix or Amazon buy a film no one criticises them if they keep it as an exclusive.
And no one bit buys one brand of car then complains they can’t buy it with a different brand engine.
I know that’s not a perfect example but hopefully close enough.
No one forces me to buy Apple products, I choose to because I like their eco system and products.
Having made that decision I’m happy that I have to use Apple App Store etc.
Apple make their products, I have no issue with them profiting from them if people choose to use apps, films, music etc.
I am not saying fees and charges are right, but the environment is one I’m happy with.