Girls can get into games because they are more likely to not care about "being the best" etc.
Trust me, that's not even close to true :P
I have two close female friends who play MMOs, one being my girlfriend, and they are both obsessed with being the best.
And I still think the biggest issue with SWTOR is in how similar to WoW it is, so it doesn't feel like a new game or evolution for MMO players. Nothing to do with "experts" at all, since we all know each WoW expansion resets the leaderboards, as it were. You trade all your epics for greens.