That is how many people make money:
Talking some already known facts, add bullshit, sound reasonable = many think that this sounds legit, and he gots lot of followers so must be trustwortht
Same shit goes on aliens/bigfoot/other weird shit area, some dudes make tons of money by sounding reasonable
Thing is, anybody with certain skills/traits can talk shit and make it sound right.
As you said, you are new listener.
So, logically if we assume that here are people that have been following his stuff for longer time and concluded that he isnt trustworthy:
A: you should trust him "because he sounds reasonable"
B: should not trusth him because other people know the truth(assuming they arent lying)
There are millions/billions of people that believe in fairytales (religions) because "it sounds reasonable"
Millions of kids believe in a fat dude that brings them gifts because that is what their parents said and it sounded reasonable
My point is:
They make money from it, so they can sound reasonable 100% but that means nothing, only naive and gullible would take that as proof. And people like that pay their salary.
People even defend them because of human nature, it is easier to defend and believe someone whom has fame & sounds legit, than someone random that says they are scammers.
Kind of like when man tries to tell his female friend that the guy tries to hit on her is an asshole: she just thinks that he is jealous and doesnt believe, because "he sounds and acts like a reasonable Guy".. until truth later comes out