You are exactly right. Little time was spent with the .45, as opposed to days with the M-1, M-14, M-16.
Rifle shooting is very “natural.” Pistol shooting, of any kind, is much more difficult to do accurately unless one is thoroughly schooled in it.
The rifle (and the human body connected to it) is inherently more accurate than any pistol.
back in the day, we only fired the 1911a1 for effect.
1 magazine at a target I don’t know how yards away. Had to be post boot camp but I just don’t remember when.