I have a thumb safety on my 9C and I can't tell you how many times I've gone to put it on before heading out the door and the safety has been off or walking around with it holstered and it has come off.
"Regardless of whether justified of not, you will feel sad about killing another human being. It is better to be sad than to be room temperature." - Joe B Fricks.
01 FFL, GOFFA, NRA, GOA, IAVA, VFW, ABATE of Iowa D15.