Depends on the franchise. Subway, for example, is apparently an absolutely brutal franchise to run, whereas Chik-fil-a is super careful about who they give them to.
I happened to pick two fast food chains because I know they're on polar ends of the "How nice is it to be a franchise" spectrum. The core of the point is that not all franchises are created equal.
But it matters which franchises you are talking about. A restaurant like Maggiano's, or Bonefish Grill is as far removed from Subway as Subway is as far removed from a 7-Eleven.