Credibility matters. Denying the big problem exists in spite of an overwhelming consensus results in being distrusted and ridiculed when (perhaps rightly) playing up a small problem over the big problem in a particular space.

Likewise no one cares to listen to people who refuse to get vaccinated or do anything at all to reduce spread of a disease when those same people want to talk about whether the disease made a trip through a lab on it's way to the general population.