The only excuse for putting the safety catch on the trigger is because it's cheap. From a safety point of view I think it's poor, as it forces you to be fiddling with the trigger when you aren't committed to releasing a shot. It leaves a lot to be desired because it's a needlessly tacky and stupid solution - just about everybody else puts the catch in a better place and designs a linkage such that the safety either blocks or disconnects the trigger. I particularly dislike the Air Arms catch because (at least on the examples I've handled) the catch does not have a firm stop when pushed to safe. Would such a design be tolerated on a powder-burning rifle?