I highly speculate that it's personal. The selection committee is comprised mostly of journalist. BB has long had an adversarial relationship with the media, especially when they ask stupid questions.
One that sticks out is after BB stated in a press conference, TB12 will be starter upon his return from his suspension. A reporter asked if Jimmy GQ will remain the starter if he plays well.
BB responded with "Jeezus Christ"🙄. Tag 'em and bag 'em, boys. BB just buried another reporter.
I'm 99.44% certain BB's snub was personal. I'd bet your bottom dollar on that.😉
Bet that as it may, facing the press is part of his job (his #1 mantra), and dumb questions or not, actions have consequences.
As a veteran coach with decades of experience, reading the opponent, including the press room to him, is part of his skill set, no?
Halls of Fame are popularity contests, and membership is in in the hands of people with axes to grind, never played the game, etc. They should be taken for what they're worth.
BB is no dummy, and I'm sure he understands that, if he cares at all.