> How does not allowing devs to sell subscriptions on their website help with this arguable safety?

By making sure the user has a single channel for dealing with payments and complaints.

Deliveroo did an update their software that wiped out my login settings. They didn't support apple login, so I lost access to my account. They won't recover my email because of a special character in it, and so they continued to charge me for their "plus" service every month, and avoided any emails I tried to send asking to stop (asking me to "log in" to change my payment settings!).

Requiring apps use Apple's channel would have protected me from that experience.

> Don't bullshit.

If you're not trying to be persuaded, why are you arguing?

I'm not bullshitting and I'll use myself as an example. I love the fact that any payments on iOS go through Apple Pay. If anything ever happens to my payment or contact info, I know who to blame. If every developer is able to process transactions and collect my personal info, then every developer is a vector for my payment or account information getting out to the world. I don't know what they do with my info, I don't know who they sell my data to. With Apple, I know the answers to all those questions.