In some cases, I think you’re right — I know plenty of socons who are also for small government and a strong defense.
However, what I’m saying is that a number of socons, including folks right here on FR are for “solving” a wide variety of social problems at the federal level — e.g., drug addiction, pornography, gambling, etc. Federal solutions to problems like these are not fundamentally conservative, IMO, because they are not fundamentally Constitutional.
Plenty? Those are part of the socon agenda and they vote accordingly, it is the none socons that keep trying to push out portions of conservatism.