I believe that option is coming down the road. Currently it’s a differential feature that I’m sure Google and others would never implement because it would interfere with their ability to track customers. I promise you your connection is traveling across Google’s network when using chrome on iOS.I’m not sure how private relay is giving Apple a massive competitive advantage.
Proper VPNs are way more fully featured.
It seems that the real issue, is that the networks are going to lose big datasets re how many people from what region and (presumed) demographics access what services - which they can then sell onto third parties (and use themselves to develop services).
If DuckDuckGo had a bigger market share, I’m sure the same people would be arguing against that too for similar reasons.
Ban private relay and you’ll just push more and more people to use VPNs - and as that happens, their subscription cost will gradually go down thus attracting even more people.
Finally: I do think private relay should be encrypting all WebKit traffic though ie from competing browsers etc.