That's what I thought too. I'm a movie-goer, and I don't feel like seeing this. Right now my mother is suffering from Parkinson's, and I often take her to the movies. I definitely will not take her to see such a depressing movie while she's struggling to get through each day.
You don't need to see that movie either as a caregiver of someone facing that disease. I think it's a bit of false advertising IMHO.