Ummm, nooooo, I don't think so. The Beretta safety disconnects the trigger. A safety is very useful when drawing or holstering the weapon. That is the most common time an ND happens. Rriggers can also be snagged by brush when walking through a forest or swamp.
Errr, yes. Or do you find yourself pulling on a trigger that has been disconnected (ah la the Beretta you mentioned)or mechanically blocked often? As for the rest of your statement, drawing or holstering with your finger in the trigger will get you thrown off the ranges I frequent.