You make no sense. No one is arguing Apple should stop offering this service to developers.

However, Apple shouldn't be allowed to monopolize the market for mobile apps (or "oligopolize" it together with Google, if you want to be extremely pedantic). There should be other options for these types of services.

If Apple offers the best case for your business: Great! Keep using Apple. If someone else's business doesn't need availability in 175 countries (say, they are a taxi app operating in one city), perhaps they should be able to choose some other payment processor who won't demand 30% of every in-app purchase for offering them the exact same service as Stripe.