Those aren't an accurate portrayal of basic rules. #2 keep your finger off the trigger until you're aimed and ready to fire or pointed in a safe direction. A good number of guns require you to pull the trigger to pull the bolt out (my Savage), and the safety cannot be engaged while this happens. A good number of guns don't even have manual safeties (my handgun, a Glock). Additionally, you have to pull the trigger on the Glock to field strip it.
I can remember several guns that require you to pull the trigger to get the bolt out, but in that case the bolt is always in the most rearward position and there is no way way it could ever fire a round while doing so.