To be fair, this is also what I hear from my GP when I have no complaints at all. It’s not bad advice, but I think it’s what most doctors tell patients they deem basically healthy. Nobody gets hurt by eating fewer peanut butter cups and taking the dog for a longer walk.
On one visit to my doctor, where the issue was a sports related injury, my doctor told me to get more exercise. Obviously the advice is parroted so often she just blurted it out without thinking. She knows full well I train regularly and if anything get too much exercise.