Wow, that is not what I said. However, a significant portion of the population is overweight and there is no denying that, much of it because of diet, proportions we consume and lack of physical activity, kind of like me now tapping on a keyboard at the moment.
Some are genetically prone to obesity, but their numbers are only a percentage of those currently overweight. If there's a medication that will help those people they should seek it out with the help of a physician along with a nutritionist and a regular exercise program. It shouldn't be determined by a 30 second TV ad that claims "take our product and your life will absolutely improve", but only if you go and pressure your physician to prescribe it for you because the TV said so.
And I couldn't help notice that you said "if" your grandma was obese. Can I assume that she was not? But even if she was, and if a change in those things that she could control fell short of reaching a healthy weight, then by all means, a tablet or injection should be an option for her, assuming one actually exists.
One last thing, personal attacks seldom lead to an open conversation, sorry if I struck a nerve, it wasn't my intention.