I would agree with the point that, much under four pounds for a defensive pistol might be a little questionable. But I am simply not going to worry about something which has never happened, and which I conduct my life in such a way as to avoid at all costs. A so-called carry trigger job is usually in the range of 4.5. to 5.5 lbs. I'm comfortable with that. That, in my view, makes me a safer gun owner for all the reasons I have stated.
I'm more concerned about actually being responsible than appearing to be so. If that makes me naive, so be it. I would actually rather be accused of something egregious that I didn't do, than to actually do something egregious, and get away with it. In the first case, I could live with myself. In the second, I could not.