Even more, the WebView on iOS is not Safari. It's dumbed-down Safari that does not support certain features that Safari supports (service workers and all PWA-related stuff). So it's not equal competition at all.
You're parroting old news. The different engine is for UIWebView which is now deprecated in favour of WKWebView which uses Safari's Nitro engine.
Websites saved to the home screen use UIWebView's engine — but that's not the discussion, the discussion is about browser apps which can and do use WKWebView.
