Why are we going in circles? I've already explained, in great detail, what I mean with this, and how it would have to work, and why it doesn't.
Why do you keep returning to some original point and completely ignore all the explication that was provided? We've had this discussion before. And every time you just do a swift turn back to the beginning as soon as you realize you're losing all ground.
You very clearly have no idea what's going on, and why things are as they are. You're stuck in some weird idealized fantasy in which "the system" just works and is cost-effective, but that's just NOT REALITY. And simply repeating "yeah but what if it DID work tho?" is not getting us anywhere.
The scope and effort involved in this kind of monitoring are economically unfeasible for this kind of problem. And just to preempt yet another time-travel attempt by you, by this I do NOT mean "it'll literally bankrupt them", just that it's a bad business decision they should not be making, and that's why they're not making it.