Maybe it is a weakness. Evenepoel's possible deficiencies in bike handling have often been pointed out. But there's also a huge element of luck and unknown about it. There seem to be some riders who have an almost magical talent at avoiding crashes, but on the other hand many crashes in the peloton really are 100% down to bad luck or errors from other riders. Take Landa's and Serry's incidents in this Giro for example.I'm surprised that you don't remember his world championship rides, and you can't dismiss "at 21 years old" as though it were half a lifetime ago: it was his last race.
I'm not wishing the guy any ill, I just think it is a potential weakness that hasn't been discussed in a thread to which (unlike most of the last few pages) it is very relevant, and wondered what others thought.
And Evenepoel's crash in Lombardia was particularly unfortunate. Ok, he overshot the corner, clearly a mistake, but I would bet that has even happend to Nibali a few times in his career. Had there not been a bridge with a low railing in that corner, but maybe a ditch or something, or a wall, then maybe he would have lost the race and gotten some scratches but he wouldn't have had a half year break in racing.
Time will tell if bike handling is a factor in his success/failure, but that one crash doesn't mean much imo.