I think Mrs. Hagelin is just a bit biased as an Eagle Mom.
The BSA, as of today, still does not admit homosexual men as leaders for the same reasons the Girl Scouts do not admit heterosexual men as leaders. At best, it doesn't look good. At worst are those cases where predators have become scout leaders and tragedy has resulted.
So the BSA does its best to screen out leaders with male sexual attraction as a sensible precaution.
I don't really want to go out in the woods with a troop of young girls. But there are unscrupulous men who would jump at the chance. The BSA deals with the same problem.
But that is not the substance of this current decision by the BSA. The whole idea behind scouting was that as the industrial revolution moved fathers off the farm into jobs and out of the lives of their sons, the resulting lack of direction could cause some young, vulnerable and easily confused boys' lives to spin out of control.
Many have been wrongly convinced they are homosexual. Scouting aims to provide positive male role models for boys who might be missing that in their life. Who knows how many boys who thnk they're gay will get themselves together by being part of a group whose founding purpose was to straighten boys out before their lives went seriously off the rails.
By all means, admit gay scouts.