Typically this kind of ammunition is typically not used for target practice. That cuts a wide swath in the ‘training’ justification. This ammunition is intended to be a very effective and brutal killer.
I have to disagree with you here.
Each individual cartridge is an integral part of the operating mechanism of a semi-automatic pistol. It is the height of foolishness to train/practice with a different type of ammunition than you will carry.
Back in the olden days when LE had revolvers, it was reasonable to practice/train with less expensive non-hollowpoint ammunition of the same bullet weight and velocity as used in service.