It's more of a thinker if you get past the very well done and entertaining first layer of 'slop'. (Content warning: there's some offensive potty humor and LOTS of violence in that first layer!)

The movie considers potential. A literal multiverse of potential. It also explores how society treats people using their potential and time in different ways. As fellow readers gray and their family relations start to get older they too will likely have the misfortune of knowing people entering dementia. How people are treated as they slide away from this reality is represented rather well by the film.