Or perhaps the idea of women just sitting in public is KH’s idea of assur. In our place, there have been times when people took issue to girls / women playing ball. Not mixed with men, just the idea of ball playing period. Therefore, our place is not mean for that level of frumkeit. On the other hand, I have friends in colonies that forbid grilling, and no one over the age of 9 can sit in front of the bungalow.
Clearly, that’s not a place I want to be. Nor do I want to be in a place where the pool is mixed. SO I (like KH) chooses a place that suits my comfort level. Like so many other distintions, its matter of definition and who’s doing the defining.