[blub]

Yes, I would blame the choice of the method if most patients are too lazy or busy. A good choice would instead work for busy and lazy patients or would convince them to be less lazy and/or busy :) Multiple options should be offered depending on the patient.

I've given actually a similar example regarding the "eat well and do sports" advice. It's not bad advice, it is correct, but it's not working for a large segment of the population, causing massive problems for health care and later (or now?) society.

Instead of cheap advice maybe the doctor should prescribe physical therapy with a specialist where the patient can be educated on the what and the how. Or the appropriate gov organisation should ban or heavily tax soft drinks and crappy foods and make good, healthy food affordable and available.