Such a statement is pure denialist opinion. You have nothing but opinion when it comes to knowing what is and is not possible. Blanket denials and labeling others as "kooks" are the tools of those who seek to cover up the truth. When you control all of the major media, you can do just about whatever you please with only a few key people.
But let me ask you, how many people were involved in the Weapons of Mass Destruction conspiracy to lead our nation into an undeclared war that has cost over 100,000 soldier and civilian lives? How many have been involved in the conspiracy to portray natural remedies as ineffective and dangerous and man made drugs as the only real medicine?