Ok. This is a nice way to dodge the issue.
Regarding the fact that most people don't want to or don't care to know, I don't any see evidence for this. But even if we assume this is true, there are still instances who have an interest in exposing anything they can to bring more clicks to their web site. There has never been as many independent press sources as there is today on the Internet and social media. Any big news headline is almost guaranteed to have a large propagation and the bigger the news, the more money is to be made from clicks. There are click-based sites that are literally fishing for the trendiest and most shocking headline, so if any large cover-up is exposed, there is almost guaranteed exposure and money. We live in a day and age where keeping secrets is the most difficult it has ever been in history of humankind.
keeping secrets from people living in denial or indifference happens naturally and voluntarily
the rulers love secrecy ... the grassroots love secrecy ... both can deny the dirty work ... most people just want someone to make them feel good ... truth outside of people's personal lives has low valued to most people
ruling structures build their foundation with grand lies
anyone who exposes those lies will be viewed as a threat
population builds the foundation of their lives on grand lies
anyone who exposes those lies will be viewed as a threat
makes it easy to indoctrinate populations
because rulers and people have lies they need protecting, they cooperate in suppression
truth has always been the enemy to most people
suppressing truth happens from above and below