I may be completely wrong, but how I see your thought process is you view semi-autos like you do revolvers.
You imagine a .357 Magnum revolver in the S&W line-up (chosen simply because everybody understands their frame sizes) if they all could be had with 4" barrels, a J-Frame would be smaller and have a shorter trigger reach than a K-Frame, that would be smaller and shorter trigger reach than an L-Frame, that would be smaller and shorter trigger reach than an N-Frame. For the small handed shooter, a K-Frame would probably be an advantage over an N-Frame. I agree.
That's not how it works in the semi-auto pistol world. A double column Glock in 9mm, from G26, to G19, to G17, to G34, to G17L all have the same trigger reach and reach to the other controls. The only difference is the barrel length and grip length top to bottom. The only advantage the smaller guns give is for concealment. They aren't a hand size advantage to those with short fingers.