I love apples draconian policies against apps: it results in consumer benefit not consumer harm.
I love closed platforms on a phone (not on a Mac). I love Apple for not allowing people to side load, change the font or other useless things that only developers and power users care about. When you look at Apple, I think of my mom and grandparents. They are the people Apple is protecting. They are the customer that can only really use Apple because Apple protects them from nonsense. Go apple. Go App Store. Go 30% cut and all the rest of the policies people constantly complain about. It’s inconvenient? Boo boo! Go into another business then.
If they allowed this I'd expect everything to load some kind of rubbish crashy invasive payments SDK asking for a credit card to circumvent the fee, and nobody to take my existing Apple balance or similar.