It's like most things when being black: there is no room for mistakes or errors. If you fukk up you gone. No one seems potential in you, no one is patient with you.
Another thing that's not talked about much: black coaches are very unlikely to get along with old cac boosters. Some coaches are born to wine and dine boosters. Drink a little bourbon, give them some "secret" insight into the team or tell a story about the time they coached a future NFL Pro Bowler, etc. Mack Brown, guys like that live for that shyt. But that's an alien environment for many black coaches, so the boosters aren't impressed or they catch feelings.
That's why I like seeing black coaches (or white coaches) who bring in black assistants. Even if it's an RB coaching job. You gotta get your foot in the door because most coaches out here hiring any white man who looks the part.
I wish more black players would become graduate assistants.