People arguing that Apple provides value by providing the platform tend to forget that the apps are what makes the platform valuable. Would you want an iPhone/iPad if it didn’t have Facebook, Instagram, YouTube, Netflix, Google Maps, Waze, SnapChat, you banking apps, investment apps, smart home apps, security apps, Slack, MS Office, WeChat, Zoom, Hulu, Disney Plus, Amazon Prime Instant Video, and much more?
Imagine if literally ALL of these third party apps ceased to exist on iPhone and iPad. The platform would be worthless.
So yes, Apple needs third party developers quite badly. They should treat them better.