IMO the real argument against it is that while helping one player, you're f*cking the others. So it isn't as simple as "he asked for help, buddy". The guy did an effort to harm other players.
This is completely different as claiming a win, since claiming it can save you from losing time in a game that is already decided in your favor.
Yellow wanted some points to avoid finishing at the 4th place. Red obliged and gave him the second place, by feeding him points.

