> Can't you make up your mind on your own based on information
The problem with this is multi-fold:
Do you know what good information looks like, or are you going to be fed crap from a circle-jerk of sources which all repeat the same lies? This is a bootstrapping problem, ultimately: How do you know where to get the first info you use to tell crap from good information?
Experts largely agree with each other in most mature fields. This is part of what it means for a field to be mature. The problem is, a lot of the liars and scammers agree with each other as well, or at least the ones all selling the same scams do. How do you tell the difference?
Since I don't have time to become a Ph.D. in biology, medicine, or an allied field, I have to trust the experts. Nobody has time to be an expert in everything.
Also, 'make up your own mind' is predicated on the idea that you are making up your own mind, as opposed to baby-duck-like imprinting on someone who makes good-looking videos and can string words. The people who follow Alex Jones think they're thinking for themselves, too. Following a body of knowledge as opposed to a single charismatic guru is a hedge against this baby-duck effect.
And:
> without the need to appeal to expert consensus (which might as well be bogus and profit-driven?)
How do you know Lustig isn't bogus and ego-driven?