It's not meaningless.
For a start, it's clearly attributed blame and shown to everyone that Verstappen brake checked Hamilton and caused the crash. That's going to affect the feeling around him in the paddock and like I said before, I think this will be the race that turns a lot of people who were for "letting them race" against him. He is quickly running out of people who want to defend his driving, and that the change in media coverage that comes with it does seem to matter to the FIA.
Secondly, the whole reason we've wanted his driving to be penalised is to discourage it, right? We are fed up of his "yield or crash" way of racing. If he doesn't change for next week after twice being sanctioned for bad driving by the stewards in one race, he'll get punished and lose the WDC.
Also, he did get penalty points, and no he can't punt Lewis off the track to end the WDC because these days, that would lead to a points deduction. Given they're level, any points deduction would forfeit the WDC.