If you thought something like this you confirmed how prejudices dominate our mind. And even if you didn't think something like that, you can't argue its importance away.

Basically you start the article with saying that people have to take your prejudges about how people are going to read the article seriously.

in the opposite way: being dressed to well might make you look stupid (imagine a "Barbie" talking about AI)

Dressing well depends very much on your audience. If you want to talk about AI you could wear a T-Shirt or hoodie with a Logo of some Hacker conference to signal that you are a hacker who knows something about computers.