I disagree. If guys like Iserbyt and Toon Aerts would focus a bit more on road cycling, they would be able to get some nice results for a Pro or even WorldTour team. Quinten Hermans is a good example. Even Laurens Sweeck won a 1.1 race with a late solo once, and lots of other riders in that top ten are or were more than decent road cyclists. And look at what young Thibau Nys did a few months ago, albeit the U23 ranks.Iserbyt (and similar riders) do some road racing in spring and summer, and - at best - are able to get results in 1.2 and 2.2 races.
But it's true that Van Aert and Van der Poel are from another planet. And like Logic says, the circumstances were 100% in Wout's favour. I'd dare to say that on a faster course with more speed technicalities, he would've had to battle much harder to even get on the podium. It's an adjustment that favours Mathieu more.