If the hollow points have a different point of aim than, say, SWC or RNL, you might wish to train with them.
While your point is well-taken, the reality of practical use in an actual self-defense situation makes such small differences as that immaterial for the vast majority of us.
Such real-life scenarios are frequently at short distances, and in high-adrenaline situations, where the basic practicalities of keeping the gun running, stance, presentation and grip will go much farther towards success than precision aiming. If you train most of the time with 230gr .45 FMJ in your 1911, when the SHTF it will not matter much if you have 230gr .45 HP ammo instead, IMHO. Center of mass is center of mass, and head shots are not practical at great distances under those circumstances anyway.