I dont disagree. From a technology POV, there are zero reason why anything cant be done on WASM in the future [1], and how WebGPU with extension could be used as a replacement for Metal or Vulkan. Or working on DOM access with WASM ( or is that a thing already? ). Others such as Web App and Web API could be developed. But none of these works at this point in time. And not in the near future. Especially when, as you said the platform vendors do not have any incentive to do so.

The single click Home Screen is definitely a platform limitation and not a technology limitation.

There are dozens if not hundreds of Real world examples where companies moves to Web Based technology ( example Ikea ) and move back to Native App simply because the experience, and user retention rate is far higher in Apps. React Native is bridging the gap but many would argue that is Native as well, not Web.

I am not in support of everything App Store. I think there needs to be a balance of things. I think there needs to be an option for user to install ( or sideload, which is a word I hate ). What we dont have an answer is how should Apple monetise what ever they think is needed for their R&D cost that is also acceptable to user and developer.

[1] https://www.destroyallsoftware.com/talks/the-birth-and-death...