Apple and Google already do a similar thing, it's called the safe browsing list. You can certainly disable it but what you're describing is already happening.
That's actually a good way to strengthen my argument. Safe browsing is just Apple filtering website traffic to warn you of potentially insecure websites, but it's really just a warning which you can readily bypass. Such a system could also work for apps, others have described how easy it would be to implement.
But in regard to my parallel of the app store and the internet, no it's not the same thing. With my example you would ONLY be able to view websites Apple had specifically vetted, you would not even be able to see a non vetted website at all, much less be able to accept and bypass the warning, similar to how the app store functions today. No warning, no flag, just a complete absence. This is also much different from my "curated" internet, although in all honestly I was just being snarky as I believe everything Apple will eventually be "curated" with a monthly subscription.
It's also fascinating that this feature was sending data to Google and Tencent for years before Apple fixed it to go through their own servers.