The problem is most companies are not interested in building rich native experiences. Amazon is a trillion dollar company and their mobile app is horrendous. They don't see it as a priority, it's just something that has to exist, like how companies have to write awful PR blog posts that nobody is reading.

For me, the "add to home screen" means the PWA launches in fullscreen without any browser chrome and that helps the experience a lot. My home screen gets a tiny bit more cluttered but that's an acceptable tradeoff.