I think this is a lazy broken heuristic that ends up labeling all social criticism and all allegations (even if credible) as "crazy." It's very Soviet-- you are mentally ill if you disagree with the government.
The problem is that we have hard documentation that governments (including but not limited to the USA) have run actual named and funded programs and efforts with the explicit intent of sabotaging crypto available in the public market. It's not even a "theory." It's established historical fact.
Believing the queen of England is a shape shifting reptile or that we didn't go to the Moon is a woo-woo conspiracy theory. Believing in things with a hard paper trail is not, nor is entertaining the possibility that governments might be doing things that we know for a fact they have done in the past.