I think it’s generational. My parents simply will not watch animation and they don’t realize that they can’t explain why because they were just told “it’s for kids”. In fact, their entire generation seems to have responded with “okie dokie” to everything they were told when they were young and now all of that stuff is the gospel to them. My mom even said once (on South park) that she found it funny but couldn’t watch it. On the other hand I don’t really meet too many people my age that can’t debate between family guy and American dad. Almost everyone I know has watched big mouth.