Yup, but I'd wager the issue is that you can't expect every business to move to that type of restroom system overnight. For one, it would be expensive and some businesses likely couldn't afford to make the change. And as Dave mentioned, for some places it's just totally impractical, like at a stadium where you have large masses of people hitting the restrooms at the same time. I'd also argue it's pretty impractical for your average bar, as you want to allow for people to file in and out as quickly as possible (I don't know about anyone else, but I've left bars before when the bathroom line was too long), and people with dicks can naturally get in and out of bathrooms quicker than those without them.