I've always been told dry firing was bad but no one ever gave an adequate explanation as to why.
They always say something about punching air. Having the pin propelled forward and not striking anything somehow stressed the metal beyond its designed use.
Admittedly when I punch the air with all I got it does hurt my arm. But when I punch the wall it hurts too.
So I've always kept dry firing to an absolute minimum. And I replace the firing pin every 20 years or so. Even if it's not "bad." I can't imagine that it improves the pistol in any way.
Striker shmiker. Its the same thing. In one the firing pin is propelled by a blow of the hammer. In the other its propelled by a spring. I'm less than impressed.
Is it six or half a dozen?
Obviously I'm not a striker worshiper as is the current fad.
If it concerns you (as it does me since I'm not really sure). You can use "snap caps." And there will never be a need to dry fire again.
The firing pin or striker (as the case may be) hits and pushes the metal in the snap cap as it was designed to do with the primer. This solves the problem whether it's real or not.
I feel I don't have to know the 'truth" as I've solved the problem anyway.