I learned my lesson on those switches flying UH-1Ns in the Canadian Air Force.
One day I took my camera with my flying, and left it lying on the center console. Just as I picked it up, I noticed the strap had managed to snag itself on the triangle, and if I had pulled any further I would have put the engine into manual...
The other reason it's a gotcha is that on startup, if all you do is count caution lights instead of check which ones are actually on, you can miss the fact that the engines are in manual.
If I owned any Bell 212s I'd put a guarded switch on it in a heartbeat.
In fact, National Test Pilot School does own the only civil registered UH-1N (an ex-Canadian Air Force one), but we deliberately didn't change the switches so that budding student test pilots and flight test engineers can easily find things wrong with the cockpit, and if they don't we can show 'em a real problem. We also fly with the students all the time, and know the problem!
But if I owned a commercially operated fleet...