Comment by Lutger

Not coincidentally, it is because of their bias, not some hidden conspiracy.

Occams razor requires you to drop assumptions that aren't required to explain a thing. A conspiracy involves a lot of extra stuff, furthermore it is often hard to find evidence for - usually because they just don't exist. There are so many problems with them, it should really be a matter of last resort.

Conspiracies do exist of course, but I feel you should only use time to explain the world if you have sound evidence, and still be open to falsification.