I think you might be seeing guys who do that well so it's a bit survivorship bias. For most, if you just record yourself talking for 1m and watch it back as a video it's incredibly painful and awkward. The filler words, tangents, weird pauses. It really made me have respect for great speakers
All of those people have already pass through a filter of self-selection
There's a person out there that's 1) knows how to bake amazing cookies 2) has no desire to record tik toks
Why is that you need both of those things combined to have a successful cookie business? Can't we desire a world where just being good at baking cookies is good enough? You don't ALSO have to record a bunch of tik toks?
Some products are so good they don't need marketing. Some marketing is so good the product doesn't matter. But most of the time you need both.
Even https://en.wikipedia.org/wiki/Ignaz_Semmelweis had a great product (idea): if doctors wash their hands, fewer of their patients will die. But his marketing (personality) was off-putting, and his ideas weren't accepted until after his death.
No, I have seen plenty of awkward people talking about their new business. The awkwardness is inferior to charismatic speakers, for sure, but it's still better than generic AI slop marketing content.