Why use sales figures as a metric for winning?

[Skeeuk]

kowenicki said:
@skee

are you saying you have never argued over sales?... do me a favour mate.

OT;

sales is fact, everything else is opinion and there is little point in arguing about opinion.

ive never claimed that game A is a better game than game B simply because of its sales.

im talking about ppl on here who use sales to determine which game is better.