Probably a case of maintaining some historical connection/reference to the original organization. Might even be some legal reason/justification to retain “BSA” in the organization’s title.
As for the decision itself, this is just the end of game move in a series of recent BSA leadership decisions. After all, when you have (after a lot of internal turbulence and external pressure) decided to admit homosexuals and transgender “boys” into the organization’s membership and leader positions, how can you continue to exclude “real” (or to use the politically correct term, CIS) girls and women?
Logically speaking, unless you are very careful, when you creep out onto a slippery slope, you may be obliged to slide all the way to the bottom; long term consequences be damned.
This is just the last gasp of a dying organization; in my area they’ve been losing members and selling campgrounds for years. Like fluent English and blinkers/turn indicators, these are just lingering symbols of the WASP culture that made this country great. The replacement Americans don’t entrust their children to strangers, and the remaining Americans barely have children.
Now that we know predator adults look for positions in these groups, it is hard to justify joining them without some extreme safeguards.
Another positive institution corrupted and washed down the drain.