Old revolvers had the firing in on the hammer and could fire if they were dropped and landed on an uncooked hammer. For most of the past century, however, the firing pin has been separate from the hammer and that kind of drop-fire is impossible.
I have some bad news for you. https://www.cnn.com/interactive/2018/06/investigates/sig-sauer-p320-drop-fire/
That model was one of the most popular service pistols - LOADS and LOADS of them out there. That is also not the only model with drop-fire problems..... Remington 700s will unintentional discharge as well:
https://www.gunsamerica.com/digest/remington-fix-triggers-model-700-rifles/
There are others I cannot recall.
It's a problem.