The logic? It's simple, Ruger guns are low tier representations, like the Hi-Point, they are usually only popular with a certain subset of the market....Whats so difficult about that?
Truth is, Ruger pistols are not well regarded by the professional gun toting portion of the market, if you don't like that, well tough, it's just the truth! Ruger is very similar to Taurus Int in that both are prolific manufacturer's of lower quality firearms, you'll see few, if any examples of their product being carried by LEA/LEO for just this reason....
On the other hand we have Glock, carried by about 70% of all American LEO's, Ruger makes no pistol that is able to qualitatively compete with the Glock 19, if they did every cop in America could buy two SR9's for every Glock 19, and they would!
But they don't....