Apple spent a huge amount of time and money getting Safari in line with PWA standards in the past few years. Your comment would make sense 3 years ago when it was completely unclear whether Apple will flinch.
"You mean to tell me there's this thing called the world wide web, where anyone can just host anything and all people need to access it is a few words typed into a program that runs on anything? They don't need to buy our proprietary iDevices?! They don't even need to pay us a yearly ransom to put their stuff onto our store?! But what if it's something we don't approve of? This is preposterous and I want it dead."
- Tim Apple, probably
I wonder what kind of preachy "we are so brave" excuse it will be this time now that they're finally forced to allow app sideloading by the EU and Japan.