This is an absurd and false statement, and is a perfect summation of why so much mis/disinformation floats around and is so popular in today's online world.
Experts do indeed have their own inherent biases. This part is a glib truism because experts are people, and all people have biases which both consciously and unconsciously influence their decision making.
But that is not "just" what experts are. Experts are people who have, by definition, expertise in a given subject matter. Unless you too are an equal expert in a given topic, experts--once again by definition--know more than you do in that field.
It doesn't mean you need to take what they say as gospel, so to speak, but it does mean that when the choice is to listen to 'random person on the internet' versus 'someone who has studied something for years and has made valued contributions to the field', the two-despite both having biases-are not on equal footing.