Low power devices like AirTag rely entirely on Bluetooth LE and the Find My network to determine their location.
Besides, receiving consumes more power than sending, theoretically Apple can just shut off the receiving part and send intermittently (every 2 sec or so) and achieve very minimal power usage.
Again, this is just speculation, I’m genuinely interested in the details.
Is there any OS that offers that by default? I don't remember ever seeing that on Windows or any linux distro I used.
Besides, MacOS is cherished by many as a UX/UI masterpiece, yet there are many annoyances that need to be fixed by the user. For example window management is a big one, I simply haven’t been able to achieve the comfort of i3 on my work Mac. (tmux comes close, but I can’t run Firefox in there)
I am not able to disable WiFi from the login screen.
I think it would be a horrendous decision to allow random people to do this.
But maybe that’s beside the point, I’m interested why you see this as a bad thing?