I think it’s the angle of the glock grips.
They simply don’t point well for me either. I can press out with cz, sig, hk and the sights always seem to fall where I’m staring. Every time I try it with a 19 it’s pointing somewhere else.
I dunno.
This is a common trope/problem based on the shapes of peoples hands.
For example, if I pick up most of the newer HKs, my NPOA with those guns is like 10-15 degrees down. I bring the gun up "blind", oopen my eyes, and im pointing it down. If I do the same exercise with a Glock, its slightly high but not awful (I can push the front down easily). Guns like 1911, CZSP01, etc. fall closer to being on point.