While not a gainer myself, I have heard mixed reactions.
When fattening my now husband, he didn't exactly say he wanted to get fat, but they tried to get him to exercise, which of course he was reluctant to do as he got fatter. There were some disagreements about his gain, but eventually he did tell his sister that he was happy where he was, and although she has a hard time dealing with it, she eventually stopped trying to promote exercise.
My current friend who gained 50 lbs in quarantine has completely let loose
4 years