I can only speak from my own perspective as black male in his 20s (so not the age problem described in the article), but it was the fact that I was raised to NOT buy into & instead be critical of stereotypes of "what black males are supposed to do" that I even allowed myself to believe that I could start learning C++ — when I was 10 years old.
Had I spent most of my time watching/INTERNALIZING what's on BET, the news, TV, I would probably feel like there's no chance for me in tech, and I wouldn't even consider it as a possibility — therefore never apply for the job, or apply to college for a CS degree, or subconsciously set myself up for failure.
Mind programming has subtle, but POWERFUL impact on the young developing mind. I'm realizing this all later and all I can say is "holy shit, I'm grateful. Thank you, parents. Bullet dodged."