Your cultural beliefs and intuitions ARE personal issues and biases. They are challenging to overcome. Racist people don't get to being racist by reading a blog post or two; they develop and internalize it over time like any cultural trait. Same goes for these anxieties people of color feel.
It's ignorant to not realize that all of these things are mental. Duh, therapy helps. Trust me, every single person of color who works in tech and sees a therapist talks through all this stuff with their practitioner.