Well, that's the whole meta-joke, that he wasn't a nerd (what he was trying to project to fit in the startup/venture culture), he was in fact a bro with bellow average intelligence.

When people talk about crypto bros and tech bros that's the whole shtick, they are saying their targets are not defined by technical ability (which is stereotypically attributable to geeks). So pointing out he wasn't really masculine is failing to see the metaphor behind "crypto bro" used as an insult.