While facts should be the standard, you're making an unfair demand.

Marshaling facts and applying them correctly is on orders of magnitude more difficult than simple assertions. You can run around telling people the sky is brown and that they've been conditioned to see blue. And it will take someone with advanced knowledge of visual spectrophotometry to demonstrate why brown light doesn't actually exist and therefore the sky can never be brown.

Facts can not keep pace with plausible assertion. Ever.