Users prop open fire doors all the time for a ton of reasons. The vast majority of the time is just for sheer convenience, -the just want to pass through without exerting the incredible effort of pushing on the handle. No amount of licencing and enforcement regime is going to stop crap like fire doors being propped open for stupid reasons. As far as other types of installations, any typical new/existing construction area is already going to require permits to be pulled and inspectors called on the scene. New and different licencing and enforcement regimes aren't going to solve the problem of...people not pulling permits in the first place. Unless you make the fines for every given code violation so outlandish as to have the potential to completely cripple a business, idiots will continue to take shortcuts and do shit like prop open fire doors for the lamest of reasons (like for sheer idiotic convenience).

So in our example here, some dude in the office just ran some cables as a temp fix for connectivity. Electrician licencing requirements and stepped up enforcement would do nothing because Brad didn't tell anyone. On the other hand, if he did or if an inspector is on site for the next round of reno that someone (properly) pulls a permit for, they'll see that and force them to bring it into compliance. The compliance and enforcement regime already exists.

So again, the enforcement regime is already in place. The code exists and must be followed, and there are sanctions in place for structures that are not up to code. Changing the licencing requirements for low voltage techs has zero effect on what is likely going on here.

I can't tell you how many quotes I've provided customers where they wanted a new installation during a reno and didn't request an abatement of legacy wiring and despite my warning them the marshal was going to a)see it and b)refuse to certify for occupancy if it wasn't addressed. Each time an inspector lays eyes on a structure no matter what reason they are there, at that exact moment you better be prepared to come into compliance. They don't care that you weren't planning on an expensive abatement of a situation you've been living with "just fine" for years. Change order incoming. It's a fresh start from a compliance standpoint every time an inspector sets eyes on any part of your building.