The internet is flooded with shitposts like yours in every article about weight loss. Diet and exercise, in the real world, appear to cure obesity about 2% of the time. That's like... shamanism cure rates. So yes, we'll need a real solution, and no, shitposts like yours won't bring it to fruition any faster.
If there was a pill that cured a disease if you took at every day, but 98% of the people with the disease couldn't manage that would you say the pill didn't work?
There are no fat starving people, when people in general eat less, there was less obesity. Almost nobody gets fat without eating too much and exercising too little even many of the metabolic disorders trotted out as excuses won't make you obese by themselves.
Sure some people get lucky through genes and/or gut flora can eat more and not put on weight but it can't be that every thin person has this because the obesity problem is relatively recent and limited to certain countries. So there have to be plenty of people out there who are not obese but it isn't just luck.
There are other things that could help, regulating and/or taxing fat and sugar in food for example. Looking for a medical solution for a cultural problem seems like a problematic idea to me though.