you are reading me wrong, and most of my games are peaceful. there are many different kinds of "power"; military power is one, but there is scientific power (taching stuff that your oppponents don't), and cultural power (make other people want to be like you), and economic power (can build a lot of stuff very quickly, which can be used ti achieve any of the other powers), diplomatic power (getting others to do as you wish), even religious power (getting others to pray to your god)...
well, if we must define power in some way, perhaps a fitting definition is "you can do something that others cannot". be that annihilating someone with your army or converting them to your religion, they ar types of power.
But that's the thing. If you win a scientific victory, then clearly you dominated the game with your scientific power. for military you dominated with military power. for religion, your religion dominated others. For tourism, I'm not really clear on how that works, and I noticed that at some point foreign tourists keep growing while domestic tourists don't, and well, maybe if I understood better how the tourists are calculated I would like that win condition more.
My post about wanting to win with "power" was in reply to some suggestions that victory points be awarded for some random achievements that didn't really require any kind of dominance.