You're looking at it too literally. I totally agree with what you've said, but that's not what the phrase is really alluding to. Is it better to go and attempt to get three points, than sit tight for a draw? Of course it is. And sometimes, doing so, will result in zero points. And sometimes, it won't.
I would suggest, without doing any analysis or research, that those teams, who are capable during a match of getting all three points, would fare better over the season, than those who aren't, simply because they are going for the win. If a team pushes, and gets two extra wins a season from having this ability or mentality, that's four extra points gained (above the 2 points gained for drawing those two games). 6 points in two games, that would take 6 games to achieve if those games were draws.
We've 10 games left. We'll run out of games if we draw too many, and that will kill us.