Generally, the team that wins the league has scored a lot and conceded few in comparison to the rest of the league. that's because their a better team as proven by winning the league. The reason they've won the league is because they got more points than anyone else. The only time goals really count is when it comes down to GD
...and the reason that they've gathered more points than anyone else is that they've generally scored more and conceded fewer than the rest of the league.
I'd wager you could go back year after year and the side that won the title had the best GD in the division. The points are merely the result of that stat.
I also said the two are linked since the team that wins the league is generally the best side.

