I understand how you feel about the audience laughing at the so called fat jokes in movie, I don't think it was Pixar's message or intent to send across fat jokes. At least, it didn't feel that way to me. When I looked at the lounging people in the Axiom, I didn't see fat adults - I saw very large babies.

The whole movie purveyed that message to me. Humans have become incapable of fulfilling our responsibilities to ourselves and our environment, and have devolved into giant babies. The robots are just fulfilling the role of adult, taking care of residents and attempting to give us a fresh start on our planet. Maybe everyone didn't see the movie on that level, and it's very likely that a lot of the people in the audience are going to take it as fat jokes. But I can't help but feel that a lot of viewers and reviewers are getting the wrong idea and that isn't Pixar's fault.