Advertising Bedroom Activities OK, but Breastfeeding Not Allowed in Military

I just want to make sure I understand what's happening....
The military has recently decided that marching in a gay pride parade while in uniform and being on active duty is going to be allowed but breastfeeding your child, a completely natural and healthy activity- while in uniform is NOT allowed.

The second story denotes that two women, who had their picture taken while breastfeeding, were in the wrong according to the military.

According to the AP, The Washington National Guard and Fairchild Air Force Base say the two mothers were "wrong to be photographed in uniform." National Guard Capt. Keith Kosik said that it's a violation of regulations to use the uniform to promote a cause but the women will likely not be punished.

So I guess I'm just confused- because it would seem to me that marching in a gay pride event would be using the uniform to promote a cause.  What a shameful decision on the part of the military to disgrace two loving mothers while promoting the cause of gay marriage to further advance their political objectives.