Most people don't use PWAs... as they exist today.
What would happen if Google added all the APIs to Chrome that are needed for every one of their iOS apps, and then offered them as "PWAs that work best with Google Chrome"? Google would not have to abide by App Store rules, nor the rules for app marketplaces, nor pay the Core Technology Fee of half a euro per install. Apple's entire approach of using their status as a popular phone manufacturer to control the software market would fall.
What would happen if Google added all the APIs to Chrome that are needed for every one of their iOS apps, and then offered them as "PWAs that work best with Google Chrome"? Google would not have to abide by App Store rules, nor the rules for app marketplaces, nor pay the Core Technology Fee of half a euro per install. Apple's entire approach of using their status as a popular phone manufacturer to control the software market would fall.