computeropponen: What I mean is that getting a draw is a slightly better result for the lower rated person (imagine you play chess with Karpov and manage to get a draw), and therefore the lower rated person gets in the next round.
A better alternative would be of course to play another game, but first, that is the choice of the person setting up the tournament (and he chose different), and second, that has other issues, like it could go on forever while all others wait.

Anyway, this is how it is defined, and who doesn't like it has the choices to not enter such a tournament or suck it up and play. And any tournament creator can define that matches are for '1 point', which results in repeat game, instead of choosing '1 game', which forces this kind of decision after a draw.