Idk, I can only speak about people in my environment.
Where I can only remember one case which might have been because of overeating and I say might because I simple don't know.
Multiple of the obese people I did know had a more controlled and some times far more healthy diet then most people I know.
Many cases I know did slowly but continuously got bigger, i.e. something which can totally happen without overeating.
I also had meet people the other way around, like needing to consume ~6000+ kcal a day when they don't do sports or they are at risk of becoming severely underweight...
> called anyone out as lazy.
The main reason I mentioned sport is because I know of a case where the person had a controlled diet and did more sport then most other people in class and still looked quite square, from what I learned this person slowly over multiple years got more and more weight without being able to lose any of it.
> . The majority of obesity is overeating (a single Starbucks muffin is a 10k run).
I'm not sure if it's the majority. It's definitely a thing, and very often a thing for extreme cases. It also might very well play a big role in countries with unusual many and many unusual extreme cases of obesity. But many of the cases I know did slowly accumulate weight over years without being able to lose weight starting from a very very young age on.
Also, I specifically never called anyone out as lazy. The majority of obesity is overeating (a single Starbucks muffin is a 10k run). Yes there are people with imbalances/medication that are outliers but most people aren't outliers.
I specifically called out a relationship with food being something that's carried into adulthood as the cause of the relationship between those figures.
An obese 14 year old may have some underlying health condition but is more likely to be a victim of socioeconomic problems; lack of access to healthier and more balanced foods, or to have obese parents (which appears to be a good indicator for childhood obesity). Neither of these are easy solves, and the blame doesn't lie with an individual, but it does explain that someone who is obese as a child is more likely to be obese as an adult.