Brilliance without discipline is a common problem for Twice Exceptional kids who weren't raised well. Probably most of them weren't raised well. The term only dates to the 90s and most schools, experts, etc only know how to cope with either giftedness or a handicap, but not both together.
A BBM would be Twice Exceptional. Most of them will be saddled with terrible baggage from poor practices of the adults that surrounded them that makes it nigh impossible to find some effective means to "be disciplined" and accomplish stuff in the eyes of the world.
I'm Twice Exceptional. Most of my accomplishments don't fit on a resume and go largely unrecognized.
That doesn't mean I haven't actually accomplished anything. It means I have trouble getting credit for my accomplishments.
I also have some challenges turning my work into an adequate income stream. I see that as partly due to the lack of recognition.
The world has trouble measuring out-of-the-box accomplishments. They tend to require metrics that don't exist or are out of fashion, basically.
It's a little like saying "We only count work experience from corporate America." That only captures a tiny minority of workers. Most people would look unaccomplished by that metric.
I'm 53. Age and experience have some value. Meanwhile, most of the world seems to think I'm a total fucking loser due to my "lack of accomplishments."
I'm trying to figure out how to write about 2xE issues so that other people with such issues have a better shot at making life work for them before they are, say, sixty.
Blaming individuals for society's shortcomings is not a great way to help people. In a developed world, we should have better answers for 2xE people than accusing them of being lazy, difficult and not trying hard enough for not readily fitting the standard mold.
We are all products of our environment. Kids who are different often grow up to be broken people because the system set out to break them. Then they spend the rest of their lives being blamed for that.