Going to stick my neck out here. Maybe not striker fired, but you get the point. I have made several holsters for striker fired weapons, my own included. You can make a holster that has very good trigger protection and retention. Some say a reinforcing piece is not needed. I agree, but I like them to add a bit of rigidity and a place for tooling and contrast. I also would add, it would be very difficult for this to cause an inadvertent trigger pull. I get most of my retention from the trigger guard on the back of the holster and a bit from the ejection port. The guns literally click when they seat. Add the tension of the belt and wearing the holster, you have to "mean it" when you want to draw the weapon. As far as "boiled leather", I think of Roman leather armor. Might have been a thing, but my wet molded holsters are very rigid and hard. Hope this helps.