That seems about as realistic as immediate dismissal from your job if you forget to unmute yourself on zoom.
Zero tolerance and enforcement should be the starting place.
(Coupled with adjusting policies and procedures to be more in line with actual experience, if we're going fully transparent)
You'll realize people get very uncomfortable very quickly when you start heading down a near bulletproof solution. They want the chaos, the charade and they definitely want the "vagueness" of laws because they can't handle the black and white nature of a lot of laws that were drawn up lazily.
If you have non-omniscient enforcement, there's a certain amount of lubrication between the law and reality.
If you have omniscient enforcement, the onus is on the law to account for reality.
Body cam is off? He's just a citizen with a nightstick. When he's tried, prosecution is held in contempt of court if they allow the jury in any way to know that, were his camera on, he would have been a police officer. Same with the defendant: if he mouths off about what was otherwise his job, he's going to jail for as long as it takes to convene a fresh jury, no bail, contempt.
Mandatory body cams were also dismissed by the cynical, and it's the rule in many forces now, perhaps even most. This is just an extension of that policy.