Perfect example, no expert said there was no human to human nor is there any chance of it. The only language close to that was "there isn't any proof of it now" which might have been informed by CCP misinformation.
Even though they were misinformed, any true expert should have known not to make any definitive statement either way. If you have such a quote, it was not made by an expert.
Do you think epidemiologists are? The people who have apparently never predicted a disease outbreak successfully, ever? Why are they experts but not these doctors?
And what makes YouTube employees believe they're qualified to decide who's right? They're experts in HTML5 video serving, not health.
Even doctors generally recognize that public health (of which epidemiology is only a part) is a separate domain of expertise. There are doctors who specialize in infectious disease who need some public-health training, but there's no reason to expect that e.g. a oncologist or trauma surgeon would know more than the average scientifically-literate person about a different profession.
Most people are not qualified to "examine the evidence" and make public health policy decisions. This is why we rely upon the experts. Otherwise you have measles outbreaks in Beverly Hills.