This couldn't be more wrong. Maybe you have a source for your claim? Doubtful, but maybe.
Per the Harvard School of Public Health: https://www.hsph.harvard.edu/obesity-prevention-source/obesi...
"Excess weight harms health in many ways. It increases the risk of developing conditions such as diabetes, heart disease, osteoarthritis, and some cancers, to name just a few, and reduces the life span. Treating obesity and obesity-related conditions costs billions of dollars a year. By one estimate, the U.S. spent $190 billion on obesity-related health care expenses in 2005-double previous estimates. The enormity of this economic burden and the huge toll that excess weight takes on health and well-being are beginning to raise global political awareness that individuals, communities, states, nations, and international organizations must do more to stem the rising tide of obesity."
"Days missed from work are a cost to both employees (in lost wages) and employers (in work not completed). Obese employees miss more days from work due to short-term absences, long-term disability, and premature death than non-obese employees. They may also work at less than full capacity (also known as presenteeism)."
"Employers pay higher life insurance premiums and pay out more for workers’ compensation for employees who are obese than for employees who are not."
It sure sounds like obese folks affect more than just themselves. I'd prefer that my health insurance premiums don't rise more than they have to due to your love of ice cream.