Besides women like me who just had a baby? Why would someone choose to be this uncomfortable and, well, "dirty" once a month? I guess there could be medical reason, but to me that is the only excuse.
We have evolved passed maxi pads. It just seems like a throwback to time when women had less options in all aspects of their lives. They restrict the activities a woman can participate in. And more than that is still a way to feel ashamed and unclean about the most natural of processes, the process that allows us to have children.
Or maybe I am over analyzing.