Making the Teams should be strictly capabilities based-If you are capable of making it through the training, welcome aboard. Currently it is capabilities and physically based--If you are capable of making it through training and have a penis (attached, not like severed in a box or something) then welcome aboard. Female aviators are a good example, and I will assure you when you are calling for close air and a female's voice is coming from the A-10 you neither get anxious or stimulated--she is a fellow professional doing her job.
Women are useful (duh) on operations. We had to take unvetted non-sof women on operations to search women. (Really bad job to be given by the way) We had no idea of their qualifications or ability. In covert situations, a couple is far less obtrusive than two hulking dudes who look exactly like SOF guys. So why not give women the optimum trainng you can to maximize their utility?
I swam competively for 12 years and played rugby for 18--I know women who could make the training. Remember only 30% of the men who try can, so a high dropout rate is already expected. If you don't change the program or make exceptions/allowances, I think you get a good product regardless of gender.