"Mr Beast" is clearly a character that is played up to, visible in the YouTube videos. Behind this is Jimmy Donaldson, who seems to regularly give interviews about his motivations, and describes in a much more mature way how he just wants to create good content and be altruistic. Beneath this however is the private Jimmy Donaldson who seems like a much more cynical capitalist who knows how to manipulate and stay under the radar on the law in order to make money through illegal mechanisms (gambling).
I'd assume it was the middle one that turned up in the Lex Fridman interview as with most of his interviews. The latter seems much more private.
Yeah, he cracked the code of how to milk money from children, incredible smart at what he's doing.
I don't think he deserves absolutely any respect for exploiting children for profit.