PWAs can absolutely be as good as native, however they aren't being given a chance due to reasons unrelated to technology. I personally believe it is the protection of Apple's fees that is driving its poor implementation of web technologies (even though their original plan was to only have web apps, with a small number of native apps for very specific things). The money they could extract from the app store made them change their tune re web apps, and they've managed to convince every Apple fan it's for their benefit. Unfortunately, this goes unchallenged by the average Apple user, who lacks the tech knowledge or desire to question Apple.
