Why should that be a silly assumption? Seems to me there are people here who would oblige another player if they asked nicely.
I can only speak for myself, but in the various MMOs I have played that have had PvP of one kind or another, there were quite a lot of very helpful people there. Sure, there are those who are there to just get their jollies out of bullying others, but they exist in the PVE world too.