Have to be honest, I do sometimes wonder how many of those might be cases of literal liars/scammers getting the roles thanks to heavily puffed up CVs and lots of AI usage, only for said companies to end up needing to lay them off again when they realise their claimed skills don't match reality.
I feel like someone has to be getting past these systems, and I get the feeling it's not the people these companies want to be hiring.
And some of the frustration there is I suspect then that some of those companies don't want to then return to their final round participants to see if they're still available because they're hit with a duality of "we don't want to admit we passed you over for a BS artist" and "well, if they haven't found something yet, were they really a final round person for us?" (not saying that's a valid perspective or not, but I could absolutely see it happening).
I feel like someone has to be getting past these systems, and I get the feeling it's not the people these companies want to be hiring.