It's well known by bodybuilders and celebrity trainers etc. But basically everyone else you talk to doesn't believe it and thinks exercise is the way to lose weight. There are many conflicting interests: the exercise companies want to keep selling exercise, the food companies want to keep selling food and the consumer is addicted to food and wants an excuse to enable it. It's no wonder this knowledge is so buried.
Agreed. Although the saying I have always heard is that you can't outrun a bad diet.
GLP-1 agonists demonstrate that intervention is more effective than will power.