I am more concerned why we don't have answers and appropriate actions to resolve the mystery. Is she healthy enough to be president?
This is more like the fictitious democrat president in the TV show West Wing, than something real like the FDR disability. FDR had a physical handicap but he hung in for almost 12 years. We are wondering if Hillary is going to make it to the first debate much less election day.
We don't do enough to vet our presidential candidates. We should at least put them through a top secret or better security clearance. And why shouldn't we know anything about their health that would affect them from doing probably the most tedious and demanding job in the world.
If my answer exceeds the bounds of your question, please delete it.