I didn't discredit him based on arbitrary critieria. I pointed out that he was granted credibility on arbitrary criteria. No one starts with credibility, it has to be earned.
I'm pointed out that this individual has not earned any credibility. Rather than look closely at the source material, you've questioned why I have not assigned this person credibility. I don't assign him credibility because there's no reason to. It's a random rapper's opinion. If you want me to treat him as credible then give me a reason. Don't expect me to simply accept what he is saying without a reason.
I asked you what is his credibility and your response is that he doesn't need any credibility. Okay, if he doesn't need credibility then why does it matter what he's saying? Should I simply pick random tweets and assign them value out of thin air?
Let me put this to the test:
I say "Why does LBJ have any credibility on this subject? He's just a basketball player." Are you going to say he doesn't need credibility, he has 49 MILLION followers and has a podcast?
To me, neither Zuby nor LBJ have any credibility on these subjects, they have opinions. I see no reason debate Zuby or LBJ's opinion on these things. Your argument (and the argument of others) is that neither of these people need to be credible on the subjects they're talking about.