Such information can be of huge help to the one getting it.
When losing -15 in an important game without injuries, many managers would think that their team isn't good enough, and may try to strengthen it, or give up chasing titles and sell some players. But if a BB staff tells you that it was just a random loss, and that in 20 such games you would win 19, it assures the manager that his team is well build already, and doesn't need further improvement.
I agree this would be a good indicator of the strength of a team at beating another, which the manager can use in future planning. So it's probably best left unshared in most cases.
That said, I do appreciate the BB's (Justin in particular) being more open to engaging the community's questions than in the past.