Earlier quoted context omitted.
Conspiracy: An agreement to perform together an illegal, wrongful, or subversive act. Insofar as 2 or more people have coordinated, colluded, or planned an illegal, wrongful, or subversive act, a conspiracy is afoot. In fact, almost all significant illegal, wrongful, or subversive acts include conspiracies to commit said acts. I think it is safe to say that the present sociopolitical and socioeconomic landscapes are…
Yes, there are a lot of conspiracies, but "Three may keep a secret, if two of them are dead;" so if a conspiracy involves enough actors, it is unlikely that it will be kept secret from the public except from some lunatic fringe.
Also, it doesn’t have to be secret to be a conspiracy.
Fossil fuel companies more or less openly conspired to obfuscate, deny, discredit, and discourage evidence from their own scientists and the scientific community at large that fossil fuel use could cause significant heating and possible thermal runaway of the planetary climate for over 70 years in order to continue to exploit fossil fuels which they knew to pose a threat to human civilisation as a whole.
Cigarette companies acted similarly. Automotive companies have done similar things many times over.
Naively believing that collective human incompetence makes effective obfuscation impossible ignores a great many examples of successful collusion and implies a very naive optimism about the information dissemination mechanisms within society.
It is more plausible that collective human incompetence makes perfect secrecy unnecessary.