Oh they're factually massively overblown. there is so much misinformation. Most "obesity" related illnesses can and do happen to everyone, but many of them are caused by unhealthy lifestyles which can also lead to weight gain. they are not exclusive!! Very few health issues can be directly tied to excess weight and if we focused on those specifically we could make meaningful progress in improving their condition. I could talk for hours about this but instead I'll just refer you to the excellent works of Aubrey Gordon.