Anybody else thinks Van Aert should've pulled more? I mean he was the fastest guy there, by far, and thus the reason for others not to go full gas. And he clearly had strength, evident by the last two pulls at autodrom and that final sprint. If he had pulled like a madman, others would work too, sensing an opportunity for them.
You earn your right to sprint for the gold. By being by far the fastest sprinter in that group, he is the one that stands the most to gain from catching Alaphilippe, and the others can try to bluff him into it. Their only chance of gold is if van Aert expends too much energy trying to catch Alaphilippe that he is unable to sprint to the best of his ability at the end, because his sprint at the end was so authoritative as to suggest even a tactical error like Longo Borghini's opening the door up would not have mattered.
The Women's Olympic Road Race in Rio is the perfect example of this. Abbott was away solo, and you had a chasing trio of van der Breggen, Longo Borghini and Johansson. Emma J has a long history of 2nds and 3rds in the biggest events. She is also by far the strongest sprinter of that trio, but also comfortably the weakest time triallist. However given the advantage Abbott has, their only chance of catching her is if they all go all out, and that means Emma has to risk tiring herself out and not being able to use her main weapon from this selection: her sprint. She absolutely turned herself inside out to match the contributions of Anna and Elisa and they caught Abbott in the final kilometre... but as a result, Emma had nothing left in the tank for the sprint and she finished 2nd. If she hadn't worked so hard to catch Abbott, she'd have won that sprint easily - but the sprint would have been for silver. Johansson realised her only shot at winning the gold was to take the risk of throwing away her biggest advantage in the group, but she did it because the possibility of gold, even if being made more remote with each turn she took on the front, was more valuable than the near-certainty of silver if she didn't take that risk.
Now, in fairness to van Aert, he did take his pulls, this wasn't Simon Gerrans in 2014 soft-turning or rolling through his turns and then whining in the press that he had the legs to fight for gold and the others didn't give him the chance to. However, the others in that group were well within their rights to expect van Aert to do the lions' share of the work because he was the guy who stood to gain the most. He was the Emma Johansson in that group, and taking more, and longer and harder, pulls on the front and letting others take less wind might have taken the risk of making his sprint more vulnerable to the others - but it would also have increased the chance of that sprint being for gold, rather than silver.
It's a gamble that you take when you get to that stage of the World Championships every time - how much energy do you have left, how much energy do the people around you have left. If van Aert had no more to give and Alaphilippe was just too strong? That's fine. If van Aert could have given more but gambled on the group being more cohesive than it was? Then either he overestimated how much energy those riders had left, or he overestimated their willingness to work with him knowing that he would be able to outsprint them. That's fine too, not every gamble can pay off and he can learn from it. However if van Aert gambled on not spending that energy and it didn't come off, that's on him, not on Rogla or anybody else in that group.