As brought up in another thread on the topic, you have things like web browsers embedded in the Spotify app that will happily ignore your policy if you're not doing external filtering.
I guess it (network-level filtering) just feels like a dragnet solution that reduces privacy and security for the population at large, when a more targeted and cohesive solution like client-side filtering, having all apps that use web browsers funnel into an OS-level check, etc would accomplish the same goals with improved security.
You could have cooperation from everyone to hook into some system (California's solution), which I expect will be a cover for more "we need to block unverified software", or you could allow basic centralized filtering as we've had, and ideally compel commercial OS vendors to make it easy to root and MitM their devices for more effective security.
Rather than “get over” it I think we need to fight. You seem to insist that monitoring/control is a done deal and we only need to argue about the form it takes, but this is not correct. Centralized monitoring/control can be resisted and broken through a combination of political and technical means. While you may not want this, I do. (And many others are being swayed back in my direction as they start to feel the effects of service enshittification, censorship under the guise of “fighting misinformation”, and media consolidation.)
At least in the US, what happens outside of your network is mostly irrelevant (except perhaps that free, open wifi should be liable for any lack of filtering). Centralized (as in e.g. government) control is non-existent, and centralized monitoring is easily defeated if you'd like with a variety of methods (though like I said we could have laws against the monitoring).