Equally superficial reading of this ends up to the following statement:
Apple is building it's ecosystem on developers. Without developers Apple wouldn't be able to build an ecosystem and find customers for it
I use safari as my web browser, which is written by Apple.
I didn’t say “no third party content of any kind”, and this discussion is about app stores after all. Apple not having an App Store would still mean I get to keep safari, so the phone is still 95% as useful. I’d miss my baby feeding tracking app and… not much else.