@futurebird The scary thing is these people not only think its true, they think there are tons of facts to back it up, we are just "sheep" for not seeing it.
This gets into a bit of muddy water.. I agree with what you are trying to say, and thats the important part... but when it comes to science and the concept of falsifiability im not sure its the best.
When i think of most conspiracy theories all of them are falsifiable in general but not falsifiable by you (or any random member of the public for that matter).
Take the moon landing as an example. People claim it never happened... Well I cant personally prove it directly either way. To truly prove it youd either need inside access to NASA or you'd need the money to go to the moon and check... So while I myself cant verify it, in general it can be verified.
E.g. a current "conspiracy" theory is that the Covid virus was not in fact novel, but just the annual flu plus a psy-op. Yes there are ton of coincidences which seem to support it (e.g. virtually no flu cases), but these can have alternate explanations. But this is a decent theory because it can be falsified by e.g. exhibiting the genome compared to the flu.