The web has a wide variety of payment processors, but that doesn't seem to slow down online purchasing.

No one is saying that it would slow down purchasing.

Only that it is user-hostile which services like Paypal absolutely are.

I'm surprised you find Paypal to be a user-hostile service! I've never had major issues with it. Would you like to elaborate?

> It means I have one place to manage subscriptions, one place with my credit card details, one place to manage family payments

You are right. Choices and options just are messy. We should just have one company that does everything. Lets just merge everything together.

> all of it is from a company that can be trusted to do things in a secure and private way.

Are you for real? Apple is one of the greediest immoral and anti-competitive companies in the world. Not just in terms of tax avoidance via offshore shenanigans or slave labor in china, but their overall ethos of closed platform. But trust Saint Apple if you must.

> Do you really want the likes of PayPal or Epic to dominate mobile App Store payments?

What's wrong with nobody dominating anything and having competition?