Well good question.
First reason is that if that don't work in my CZ 75 A (Pre-Ban, Pre-B version, CZ original, pick whichever word works best for you) then I wouldn't carry it in any of my weapons, since the Original mags work in my B model pistols I simply do not want to grab the wrong mag by mistake, so if none of my mags have HP's then I don't have to worry about feeding issues.
Second reason: I trained in a way most folks don't, actually very few even ever heard of it. I shoot for the torso first, the groin second and then as they bend forward I put a round through their pointy little heads. And sometimes I simply ship the torso or groin and simply put 2 or three in the head. HP's, jacketed or otherwise have been known to:
A) not penetrate the bone,
B) Penetrate the bone but not go deep. Even in torso shots HP's may tear the hell out of flesh but once they hit a thick enough bone they tend to stop (for more than one reason, and I'm not spending the time here to explain about kinetic energy, and ragged edges digging into the bone and coming to a screeching halt) Whereas ye Olde trusty FMJ may not tear up as much flesh, meat whatever, The will either break and the bone and go through or they ricochet off aid bone and go do more damage in other places.
C) HP will, can be, and have been stopped by heavy clothing because the jacket expanded at point of impact and the jagged edges caught on whatever and either slowed them down or outright stopped them before they penetrated the body.
People are welcome to do as they wish and shoot whatever they wish. I'm not going to sit here and tell anyone what ammo is the best and why and so on, It's their choice and how they were either brought up or trained, civilian, LEO or Military. I simply have no intention of letting my assailant(s) have even the slightest chance of surviving the fight. I figure the Hospital ER's have enough on their hands treating honest folk then to waste time treating Felons that should have been put down long before I ever got to them. As far as I am concerned the only fair fight is the one I live through, and hope my Deity of choice helps those that help themselves, and I help the hell out of myself when it comes to getting to see my family every night.