I can give you a dozen RP reasons why my Flock would be seen in House systems.
I do agree that we should leave our caps "hidden" at home, Yoda notwithstanding, (and his welcome in House systems seems to be wearing thin..).
I'll give you one example.. PM me for the eleven others:
MY Fnordettes run a strictly Zoner trade route. Baffin/Canaria/Ames/Baffin. Lo and behold, regardless of the route, they must pass through either Bretonia and Liberty, or Bretonia and Kusari.
And the amazing thing is, no one seems to mind!
Here's another.. Amulets to the Fetful on Freep 2: Gotta hit either Liberty or Rheinland. Neither of them seem too angst-ridden over it either.
As to the comment that everyone visits Liberty because of the "great RP", I hope the poster was alluding to quantity, and not quality. We get in, we get out, from fear our Pineals will turn to mush. I can find quality RP anywhere, with a bit of effort. Liberty = laziness, IMHO.
Until Zoner facilities like Ames, Freeport 1, and Freeport 2 are wiped off the map of Sirius, Zoners need access, plain and simple. If that requires a brief sprint through your beloved Houses, then so be it.