It’s comforting to them. It stokes their ego. It’s a way to convince themselves that they don’t need to change. They get to deflect criticism and chill in their happy bubble where they’re perfect. Most importantly, it’s a hall pass to ignore people who are trying to get them to change. At least for a little while.
The spring comment is valid.
From what I understand, household gods were very common — personal traditions about a small god that perhaps your family worshipped for generations and had a small shrine to for protection. Some of these were picked up and developed into more general purposes for a larger audience.
The Romans in particular also had a habit of picking up local deities for a larger pantheon, in these cases less of choosing gods, it was more like reducing some gods with very elaborate lore down to just a few specific traits. Though of course some gods were invented by storytellers on the spot and picked up.
Took me a bit to find anything on these guys other than reposts of this same picture, I wasn’t sure they’re real. The scientific name is reported wrong in some places, it should be Panchlora kozaneki. In case anyone wants to look them up.