Except some of them may truly never do. And I fail see the "problem", when phrased in those terms.
(I can understand how those who say "I play flats because I play bass not treble" may ruffle some feathers, but that's crucially different from "I've found out about flats and I don't like rounds anymore".)
I definitely see more of an anti-hipster sentiment going on among roundwound players: "Why is everyone, uh, metro-fluid and into vinyl and whatnot, these days? I still listen to my music like everyone else I know.
On CDs."