If you were the hacker operating a remote command and control for such a targeted attack, you would immediately know if Apple or some other mechanism silently b

If you were the hacker operating a remote command and control for such a targeted attack, you would immediately know if Apple or some other mechanism silently blocked your exploit kill chain. This notification to users tells you nothing new. If something doesn't work, you move on to the next exploit available to you. It's not likely that they would shut shop and go away just because apple notified users. Only thing this does is Apple gets more users to turn on their protection mechanisms like lockdown mode which makes it more valuable to find vulnerabilities in that (as that is the new baseline now). And so goes the tale. It's a never ending escalatory game.