I would agree Mike. They made the rule and aren't likely to change back to single-gender event(s), so it's up to USS to figure out how to make that work successfully.
Looking at some of these tough-person/mudder/extreme challenge events on TV, I don't think as a nation we lack males/females who can't cut the mustard as far as strength and agility go...
and if nothing else worked, we could go for the east German swim team or transgenders?