This discussion is getting too over-heated with hasty assumptions about other poster's intentions. Of course deliberate sexual harassment by a mentally competent person is always, unequivocally unacceptable, and nobody should have to put up with that, regardless of profession.
In the case of mentally incompetent people, like people suffering from dementia, the people who accept payment to take care of them need to take care of them. There is a professional need to accept that the incompetent people in their care no longer have the capacity to make competent decisions.
I've been told by several mature people who have held these care-positions that it is very common for elderly dementia victims to engage in inappropriate sexual actions. It is a factual health-care circumstance for some elderly dementia victims, and the health care professionals who choose to work with this population sub-set need to cope with it, or leave that field, because the dementia victims don't have that choice.