You make an excellent point - but I can't really say that I remember ever having read anything like this stuff:
"If I get into trouble, I'll just use my PLB". Problem solved
on this forum.
But never mind my pedantic quarreling, we are all well advised to be reminded that PLBs aren't magical talismans. But they do take the "Search" out of "search and rescue". The "resque" part can still be tricky, though... anything from bad weather, limited resources and bureaucratic foul-ups.
And a PLB does not in any way interfere with the other tricks we all know: Leave a game plan, prepare for the unexpected, ya all know the drill. Good preparations, routines and gear greatly expands your options and gives you several layers of protection.
EDIT: I don't carry a PLB, either. I'll get one when I find the time for less family friendly expeditions. Or when the technology has matured a bit more and the price has come down a bit further...