This is a really interesting thought - and well stated
There are several different answers I'm sure... I will throw out a few to get us started
1> Many people do not have the means to play those games that are better suited for PvP... plenty of possibilities, one being that the hardware requirements for FT are spectacularly low (seriously, compbatant deserves a lot of credit for this) - that cannot be said for most games
2> there are several types of PvP players - one type in particular seems to abound in FT... GRIEFERS. They get their gaming enjoyment from making other players unhappy. Yes, I genuinely dislike these people. Yes, I said "people" instead of "players" because not only do I dislike the way they play, I actually dislike them as humans... Truth be told, this was one factor that led me to leave the GM team, and possibly the single biggest reason I've never asked to rejoin the team - I don't like these people, but I also understand that they make up a large group in the gaming world. I think many are especially drawn to FT because of the lenient, caring staff; and also the opportunity to exploit bugs and glitches to irritate others.
3> clan life gives a sense of teamwork and belonging, so PvP is maybe byproduct of fulfilling those needs for some players
4> variety/excitement - some players genuinely like to be surprised, which does not happen much outside of a few quests in games based on grinding like FT
those are a few thoughts for now
