how are they not? point system already favors the winner, as winning a match guarantees you 2 out of the 3 possible points for the match. the remaining point measures how much you won by, with the other team being able to earn some of it. if you win 5-0 the points are awarded 3-0, as should be deserved by a shutout. this season points mostly lined up with w/l except in the case of invite where h5 demoman didnt make playoffs despite having a better w/l. but if u look at h2h between h5 demoman and ford, their 2 matches were 3-4 in favor of h5, then 5-2 in favor of ford, which would indicate the point system worked for the correct team as the round total across these two matches is 8-6 in favor of ford.
here you can see that ford dropped(pd) 2 total points on wins compared to h5's 4, meaning that when ford won a match, they won matches more convincingly than h5. looking at points earned(pe) ford's losses were much closer than h5's which allowed them to earn more points on loss. an overall, generalized, way to put this is when ford loses, they just barely lose, and when they win, they win fairly convincingly. compare this to h5 where the opposite is true: when they lose its by a larger margin and when they win its not by as big of a margin.
the real question is whether you care about how close matches are in addition to concrete result, and personally i think the score itself does contribute enough to warrant the point system. this is all im really gonna say tho ive said everything i want to and people are free to disagree.