Yeah, recruits don’t really have much autonomy in boot camp, so trying to blame their career ending illness on them does strike me as victim blaming.
I’m thinking that if the Marine Corps had wanted those bathrooms stocked with paper towels and soap, they would have been. I’m going to make a WAG that the omission was a deliberate deprivation that the recruits didn’t really have time or infrastructure to take care of, that is, there was some impediment beyond laziness that kept them from doing it.