By this rationale the moon landing also never happened, because everyone from NASA was incentivized to lie about it. Why bother even going when you could fake it?
I just said I loved the thought experiment. There's multiple ways to see the flaws in it. Like: how would that large group of scientists (be it at NASA or CERN) keep such a fraud a secret for such a long time? In NASA's case there'd be a lot of people coming clean on their death beds, which hasn't happened of course.
"thought experiments" like this are worse than useless, it's a way for people on the internet to discuss any hypothetical topic without actually knowing anything. You take some contrarian view and say "yes if I constructed the whole world to back into my preconceived view it could be true". It's unfalsifiable. TFA has actual facts.