Steve Jobs is dead, and Apple's primary responsibility is to its shareholders, not its users. Subtly and pervasively hamstringing PWAs doesn't protect users. What would it even be protecting them from? PWAs that work well offline? No, it just coerces developers into writing native apps and distributing them through Apple's App Store instead.
While being locked in to a single app store without jailbreak isn't ideal, I'd rather have a native app on my phone than some lowest-bidder web app that downloads 10MB every time and runs terribly.
