Dr. Rubin, in an interview with The Verge, on the number one thing he wishes people understood about science and/or medicine (emphasis mine):

That uncertainty isn’t a weakness, it’s one of science’s greatest strengths. Science isn’t a collection of immutable facts. It’s a process for getting closer to the truth. Good scientists are willing to change their minds when better evidence emerges. Unfortunately, that can look like inconsistency to the public, when it’s actually how progress happens. Confidence should always be proportional to the quality of the evidence.

Sadly, in today's political climate, too many people with zero credibility believe that they know more about environmental/medical science than actual environmental/medical scientists around the world.