See my #5 and #7.
We carry and we train using Serpas. So do a whole lot of other folks at our club. Serpas are “unsafe” the same way Glocks are “unsafe”. They’re both unsafe for idiots who can’t keep their booger hooks off the bang switches.
Properly used, emphasis on properly, your finger will index right where it’s supposed to be with a Serpa. It’s designed in. It’s idiots who don’t train out the grasp reflex who have “accidents”.
To each their own.
L