You’re focused on the wrong part of the chain here. As the camera system is only as weak as it’s weakest link, if Apple indeed made a circuit connected to the LED (and I fully trust you on that), then the weakest link is elsewhere: company provided laptops are often altered prior to be given to an employee. I know of colonies who install software to track messages etc. What’s to say the same companies don’t alter the circuit board to modify the LED behavior?

There is a risk/reward/effort to look at, putting a small piece of tape is low risk / low effort / high reward (if your company actually angers laptops).