This whole story seems odd and I feel like we're getting part truth, part exaggeration, and all self promotion.
I am a huge fan of JRB's work, but he is an insufferable egomaniac.
He's burned bridges with some of his peers because of his arrogance. For the record I don't know the man personally, but I do know someone (a composer whose work is familiar to you all) who used to be his friend. Of the two of them JRB got a show on Bway first (Parade) and suddenly it was like he had won a contest. He acted like a very poor winner, gloating and belittling the other guy.
I'm not going to name our mutual friend, so you can take that anecdote or leave it as you wish.
Having said all that, I still admire his talent, just not his social manners.
....but the world goes 'round