Exactly.
- no need to enter a CC number in another site (and maintain it)
- no need to create another account to make that payment (or unironically use Apple Pay flows)
- trivial cancellation
- trivial cancellation of limited time trials
Maybe I'm fortunate, stupid, or a combination but not being able to pay for Netflix using Apple subscriptions really bugs me and I'd pay more to avoid it. Which reminds me I need to cancel it...