If you need thicker skin to deal with honesty then you have bigger problems, honestly.
Know your target
and what's beyond.
Heard that one? It's in the top four for a reason. You are responsible for every round you fire. I don't just mean legally I mean morally. Your life isn't worth any more than any other. The same simple fact that justifies you shooting someone trying to take your life, is precisely the same reason you should be as responsible as possible when defending it. One of the major reasons to carry HP ammo is to stop over penetration. So you don't endanger people completely un-involved in the situation.
The FBI standard for ballistics penetration is 16in. How many people do you know with arms bigger than 16in in diameter? Do you honestly think that RIP ammo is going to do any more damage to a persons arm than a HP round that opens up and leaves a much, much higher percentage of energy behind in the target? Hydro-static shock is the major damage factor, along with the tumbling of the round once it opens up. The only thing RIP ammo is more dangerous to in that situation is everything but your target. It is designed to over penetrate. Self defense rounds are designed to control penetration.
What you asked was the equivalent of saying, "I can't shoot for shit. So I carry a 10 in. 44 mag. just in case I get lucky enough to wig'em." I say that speaking to the responsibility, or lack there of, in that mindset. If you can't hit with that particular gun yet. Then leave it home and carry the one you can hit with. That's just common sense. Anything else is completely irresponsible, especially since you have another option.
Don't take it personally. This isn't about being mean it's about reality. Admittedly I do tend to use sarcasm, a lot. Usually to point out a failure of logic I see as painfully obvious. Hey, I come from the days of tough love.
Rest assured I would have said the same to anyone else here. Regardless of post count or the number of green bubbles in the DB meter.
There aren't to many situations in life where something as simple as moving you finger an inch can result in people dying. Oh and, not for nothing, but before you rely on an arm hit to take someone out of the fight. Please, please, please go watch some of the vids on youtube of cops putting mags into a target and them still standing.