You fight against visual stereotypes and hierarchies related to that, which are burned into peoples minds. I don‘t think that it‘s race specific, it happens to everybody in a way. When it comes to computers and tech, people expect nerds, and behaviors associated with that. If you don‘t look like a nerd, people will assume that you joined that profession from a different background, that you didn‘t program as a kid and therefor can‘t match their ideal, or stereotype.