I think the idea is actually more along the lines of lowest-common-denominator thinking. Like how a lot of police forces use Glocks because there is no safety other than one that is de-activated while pulling the trigger. Which, incidentally, can get set off if you get a shirt tail or something stuck in the trigger guard. And how some lockable doors will unlock when the knob is turned from the inside, in case someone is unable to remember how to turn a fucking lock. I have actually seen some of those that will unlock from both sides with the knob turn, which makes me wonder: What is the point?
I don't find it all that worrying, though I do agree that tasers encourage more casual violence, as hitting someone in the head with a nightstick makes the violence and damage somewhat more immediate and visible. I think the idea behind the taser shotgun was that people were getting killed by beanbag rounds, which can end up going like frizbees, and while you are supposed to shoot at parts where there are no vitals, police marksmanship isn't outstanding in any situation, much less where people might fight back, and they are likely to forget that, or think it doesn't really matter.