This meme needs to die. Yes you can’t have alternative browser engines on iOS but outside of nerds in HN that’s an implementation detail that doesn’t really matter to end users. The stuff around the engine — the chrome — is the identity of the browser. Firefox gutted their rendering engine with project Servo. Chrome abandoned WebKit for Blink. Are they different browsers now? Of course not!
Apple can’t just enable content blocking because that would potentially break apps that use webviews for non-browser type activities.