You deprive young men and women if you lead them to believe that Scouting is only what happens in their home Troop or Crew.
You need a community with a steady population of 18 to 21-year old men and women who are interested in the outdoors, or else the program has no leadership. In most towns, Venturing programs crumble because youth leave the program when they graduate from high school. Where it has been successful, the young women seem to have taken the strongest roles in Venturing leadership. At least two of the years I was at the National Meeting, it seems that three of the four Regional Presidents for Venturing were young women.
Over the last five years as a Scouter, as I've become more involved in International Scouting and seen that all but two of the 140+ WOS Scouting programs have successfully integrated boys and girls, the more inclined I am to continue to fight the God and gays battle, and to view favorably the possibility of a co-ed Scouting program at all ages.
The problem in the U.S. is that Girl Scouting is so well-developed, and so different than Boy Scouting in many ways, that I can never see the two programs merging. We'd simply have to call our program "Scouting," let the girls in, and let the Girl Scouts fend for themselves.
I know the idea of girls in Scouting is taboo for many older Scouters, but I've seen the successes of the Venturing program, and the successes of International Scouting programs that are co-ed.