Just a couple of thoughts here, reasonably on topic...

Joe Rogan is a "celebrity." Maybe not A-list, but celebrity. He maintains that status by staying in the public eye. There are some "celebrities" who enjoy that status so much that they will do or say almost anything to hold on to it. That could explain Joe's penchant to use vulgar language, "win" by out-shouting, and voice belief in absurd "theories." It's a classic, "Hey! Everyone look at me!" attitude.

Second, Joe enjoys his celebrity status. He probably cannot understand why anyone would not want the same status. Svector isn't interested in being recognized everytime he leaves his house. Joe cannot understand this and is automatically suspicious of Svector's motives.

Third, who cares what Svector's real name is? He is stating and supporting fact. That would not change no matter what his name. If someone tells you it is raining and you should go inside, you don't stand there getting wet until he has provided his credentials.

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Never attribute to malice what can be adequately explained by ignorance or stupidity.
Isaac Asimov