There has been many occurrences where teams had to win the trophy with just a few goal margin when points seem to be leveled between different contending teams, it's for this reason teams make sure to score as many goals as they can in every game. So you know now.
Please educate him so that he will know what football is all about. If he still finds it hard to understand, he should go back to the table. He will see that Chelsea are now at the top of the table, where they had the same points with almost 5-6 teams, but they are at the top due to the interval of goals. At least I hope he will understand how this thing works..
Yeah exactly as the image explains the position better clearly showing the goals difference between Chelsea, Arsenal and Aston villa that are with sane points but with just 3 goals difference Chelsea sits at the top four just above Arsenal followed by Aston villa who are both with 17 goals and are below arsenal due to the higher number of goals they conceded which is above that of Arsenal's. Hence, it's safe to say that a team's number of goals both for and against plays a crucial role in positioning them on the table when points tally. So when you have opportunity to score goals you've to score as much as possible.