What part of the food pyramid told you to eat 3500 calories? If you stay under 2000 calories (and arent a 4 foot 13 manlet) and do a the slightest bit of movement throughout the day you're not going to get obese.
Now I will say those recommendations are dated. They were made in a time where more American's physically worked and moved around during the day. Even an office job in the 1980's had a modest amount of movement as you had to physical file things, travel to different buildings sometimes for meetings etc. Technology makes almost every job take less caloric effort, even roofers have nail guns instead of swinging a hammer all day.
No. Blame the fatties, and make Kraft Mac n Cheese delicious and fake as fuck yellow again. Macros are macros, and when you start looking at the quality/processed part of food you are getting into the micro level of the effects on the quality of those and their impact on the body.
RFK can help make food quality better, education better on the recommendations of what people eat. End of the day though, a fatty is going to eat a fatty amount of calories.