Seems like a question that has an easy answer, and it isn't just women.
We have a travel trailer because of what it provides us. Convenience, cleanliness, closeness.
Although when we were much younger and had less disposable income, we did things because we had to, today we no longer want to sleep on the ground and much prefer a soft bed, we like being able to be inside during a severe downpour, and we like the cleanliness and proximity of our trailer's bathroom. This is especially true when waking up once or twice during a cold night with the need to visit the facilities. Much preferred to just walk in my skivvies about 15 feet to go to a warm, clean bathroom than to put on outside clothes, venture into the night, walk 50 yards or more, and go into a dark, smelly and sometimes not very clean vault toilet.