Just curious, as I really don't know, but how many striker-fired pistols on the market also have a thumb safety?
sig or glock19 if money needs watched
Ruger SR9
Smith M&P
FNS
off the top of my head
The ones that don't come with an optional safety are in the minority, actually.
I've got two small kids and one glock. His kids aren't more treasured than mine.He has 2 younger kids and although he has no intention of leaving it out for them to find the thumb safety provides him an extra layer of personal comfort knowing the kids can't just grab it and pull the trigger without also knowing how to disengage the safety.
I do believe as he gets used to carrying and more comfortable with handguns the thumb safety may not be as much of a concern for him later. But for now I see why it might be a good idea for a thumb safety.