well it depends, do you keep your level from when you start and what level do you start with?
If you keep your level at when you beat the final boss back, its stupid... if not, its still stupid, if you start with lvl 1 or something at teh final boss and can't beat it because of teh nemy' sheer power, then its stupid, but then again if you de level as you progress (or degress) its stupid.
But playing it at all willprobably make me feel stupid >.>