Check out Nicholas Kristof's NY Times article from 3/6/21 on the lack of bathrooms in the United States. He looks at the issue in terms of public bathrooms throughout history as well as around the world. In the US, the lack of bathrooms runs straight into issues of homelessness as well as race, class and gender.
The Carloo definitely doesn't fix the issue, but it does provide a choice to those of us that are privileged enough to have a car nearby.