I've killed at least 5x as many enemies with the suplex than I did the roundhouse
Killed? Perhaps, but have you
used the suplex more than the roundhouse? If yes, then I have a hard time believing that, simply because the roundhouse is something you'd want to use in more situations than just "IT'S-ALL-ABOUT-1v1-DAMAGE!" (which the suplex is, it's there for
one purpose).
and I would do it on professional using only a non upgraded pistol (yes I beat the game on pro with non upgraded starting pistol and it was a blast).
I've done more challenging stuff than that, since you know, RE4 is my most played game of all time (not counting MMORPGs)
So tell me what would you do when you got later in the game and lots of enemies had metal face masks?
Game mechanics that's forcing you to use other skills doesn't count. We're talking about the practice-all-around-area in the start of the game. Also, suplex isn't even a guaranteed kill against the ganados with metal mask,
and you're vulnerable to other attacks after the animations.
edit: but hey, to each his own, right?