With all due respect, this is nonsense. This is a very common trope, but I can guarantee you the vast vast vast majority of people who are obese have tried “eating less and moving more,” and that is not new advice to them. Nobody who has been obese for a long time walks into a doctor’s office going “okay I finally think I want that injection that will help me lose weight” as if they just suddenly noticed they’re obese.
There are lots of reasons they might not have been able to deal with it before, and “laziness” is not usually in the top 5. Genetics, means, access to knowledge, living in a food desert, depression, etc. are all far more likely causes.
Being obese sucks. People who are obese are far more aware of that than anyone choosing to judge them from afar.