What point? That there's consequences when you break your own rules to decide who can be a champion. In this case the consequences would be losing the most valuable (in terms of marketing etc) driver on the grid.And what point would that be? That after winning how many titles in a row without any real opposition he's now quitting because he lost once? I'm sure that wouldn't come across like being a sore loser to most...
Obviously what happened was rather shitty. I doubt anyone would deny that. But the championship isn't won or lost on the last lap. Over the course of the season its hard to say Verstappen didn't deserve to win. RB had their fair share of bad luck and Hamilton/Merc definitely got away lucky a couple of times. That is the only reason Hamilton still had a chance in the last race to begin with.