I think facts and emotion often get combined when speaking about a topic such as this.
Taking emotion out of it, yes people are far larger than they have been. Yes we have a bigger obesity problem than the rest of Europe. No there is zero shock factor to this, have you been living on a cave?
Why is this?
Many reasons. Cost of living. It’s far cheaper to buy processed foods which make up a meal, than fresh ingredients. People need to eat. Sometimes they simply don’t have the luxury of selecting what. In this scenario more should be done to either make food cheaper (won’t be happening for some time), or make processed food healthier. This also comes with a cost so it’s a lose lose situation. This is also why statistically, those in less affluent areas have a higher chance of being overweight.
We also work very different hours to much of Europe. Many Europeans have longer lunches than us. Schools here seem to rush children to shovel their food down within 10/15 minutes, this will create habits later in life. We also have a naturally very different diet, lot more carb heavy as root veg is historically what we have grown well due to weather conditions as well as the nature of the work we did.
We cook less from scratch both due to cost of ingredients and time…but also knowledge. Adults now are often the generation who got meat and 2 veg. They also got introduced to convenience food which has got routinely more unhealthy. Many often simply don’t know how to cook. Cooking lessons on a budget aren’t something taught in schools.
Throw that in with the fact we are ‘moving less’, again for various reasons - long working hours, and for children’s accessibility to sport - once again due to cost, there will naturally be weight problems. It’s very sad that children cannot easily access extra curricular sports now without significant money paid out by parents.
Therefore yes statistically we are much larger and following inline with America. We eat far more processed foods, we have less money and we are moving less. That’s all factual.
Emotionally I don’t think this solely relies on parents at all. The government could be doing a lot more to make all of this accessible (not speaking about Labour, all governments. It’s not been a focus for years). Therefore, no, I don’t think you should be either shocked nor judging anyone. We’ve been heading this way for years. Better people have self confidence than have shame due to their size.