The price of a Safari user in the ad market is going down, and it’s exactly what should be happening. I’m very happy with Apple.
https://9to5mac.com/2019/12/09/apple-safari-privacy-feature-...
You can implement these APIs while at the same time requiring explicit permission from the user before a web application can use them. This preserves privacy while also giving users the option to have much more powerful web applications.
Apple doesn't want to implement these APIs because currently if you want access to these things on iOS, you need to go through their walled garden App Store, where they get a big chunk of any revenue you might make on such a service and can nerf competitors and all the other anti-competitive stuff they're doing.
Maybe it shouldn't "asking for permission" but "giving your permission" explicitly. If you don't need such an API, you would never be bothered by it if the model is opt-in without notification/popups.
I understand the problem you have with websites asking for permissions, especially push notifications permissions, as they keep showing up. And I do definitely agree that having a website that does not need any of these permissions ask for it would be even more annoying but there are definitely cases where I'm glad a website can help me out (and I don't have to download a heavy client that might or might not have tracking and analytics in it)
And "heavy client" is a fallacy. Operating systems come with runtimes too. Very complex native app can be very small in size if it uses the native controls and APIs. They can be KB in size. Any asset is going to be bigger than the binary itself.
The web-as-native apps are the ones that are huge, because they embed a behemoth (a browser) which is akin to an entire operating system.
In theory native apps are "trusted", but I think for the vast majority of users the trust between a companies website and app are equivalent, vetted the same, and probably do an equivalent amount of tracking if not more by the native app (facebook SDKs are pretty common in native mobile apps).
Mobile apps are increasingly sandboxed too, like websites, precisely because of that.