Have you considered why there are so many conspiracy theories going the rounds?
It is because the public has better access to info via the internet and Freedom of Information law.
Some past historic events have been revealed in their true light to be engineered by governments to create situations which happen to suit their purpose at the time.
So, like the boy who cried 'wolf', they cannot be expected to be believed all the time.
If the doubt escalates into widespread 'belief', it is labelled 'conspiracy theory', and derided.
When 'derision' happens, I tend to look for a reason for that too.
Whilst the world is ruled via greed for power and wealth, and deliberate lies
to mislead the population in order to achieve those aims
there will always be those that doubt - I regard it as healthy mistrust.