Although your argument is valid in the fact that many people could unfairly assume things about you based on your "username" or appearance, I feel that you fail to recognize that first impressions are a thing, and that would drastically shape how someone would view you henceforth. And of which the fact applies that if you use a name regularly associated with such brainrot, those adverse to it would likely avoid or be more likely to have a negative view of you.
