On the contrary, I believe developers should stand up to Apple where they can, and the browser is likely the only place for it, given they have zero leverage in negotiations on native apps, in which Apple is making life very very hard for developers who simply do not fall in line with their guidance.

If Apple will willy-nilly reject app store (both Mac and iOS) apps, retroactively change rules to kill competition (look up what they did with steam) and randomly start banning popular frameworks (electron apps are the latest victim), and still insist on being W3C non-compliant, in a blatant effort to force users and developers to their walled garden, developers need to grow a backbone and take Apple on where they can. If Mac users really want your webapp, Firefox/Opera.... are just an install away