Conspiracy theorists, as usual, are so preoccupied by the most wildly improbable scenario, the one they want to believe, that they don't ask what other explanations are possible.
Ineos seems, to some anyway, to be withholding information. Instead of immediately jumping to the conclusion that the crash never happened, why not ask what other reasons they might have for being tight-lipped.
What about the cause of the crash? From the moment I heard the official explanation I didn't get it: that Froome took one hand off his bike to blow his nose, and a gust of wind blew him into the wall. I'm not a pro racer, but I've done a fair amount of riding, sometimes in very windy conditions, and I've never had a problem like that. I'm not saying it couldn't happen, but if it were really windy, I would not be in a position where a sudden change in my line of movement would put me in danger. I would think Froome would have to be very close to the wall, inches away, which would be unsafe even without wind or momentary loss of control. Why would he be riding at nearly 60 kph right next to a wall? Maybe I'm missing something, but it doesn't make a lot of sense to me.
So is it possible the accident was caused by something else? A flat tire, or other mechanical? Another rider making contact with him and pushing him into the wall? If that were the case, why would Ineos cover it up? Maybe they really weren't sure of the cause, and didn't want to implicate another person wrongly? Could there be a liability issue at stake?
Or could Froome have some medical problem that has been unreported, such that he temporarily lost control of his bike, and Ineos doesn't want the public to know about it? Maybe he had an attack of asthma, assuming he really does suffer from that?
I'm not saying this is likely, and I'm not saying that Ineos's behavior demands an explanation, but if you do incline in that direction, this possibility sure is a lot more appealing than a fake crash. It's plausible, even if unproven.