It's a classic tactic deployed in Cycling through a long time. If one rider is clearly better than the rest, the best way to beat him is to ride defensively and suck wheels. Not very viewer friendly, but let's not pretend Pogacar didn't take advantage of Vismas work on the Hautacam stage win or other stages, where he outsprinted Vingegaard. It's funny how that's ok, but this is not. I'll grant the negative-Johns that he should have tried just a bit earlier, if a stage win was the objective, though.