Of course they are going to eat what they have, IT’S ALL THEY HAVE. If you have a choice, we’re talking about the difference between thriving and surviving. There is a big difference between the two.
It’s more than that, way more than that. Yes, the actual fast is when most of the changes occur, but in order for those changes to cement themselves and in some cases express themselves, you need to be vigilant in what you eat. I know for a fact you will get more mileage from your fast by staying raw for as long as possible. What will it hurt? You can eat your rice and grains when ever you want. But if you are going to go through 21 days of no food, you should make sure it counts. This is why you go to a clinic to do this, because they also educate you at the same time. Usually holding several lectures and videos per day. Thats part of what you pay them for, the education you get when your there. I think you may be going into this a bit blindsided.
This is why you go to a clinic. You have some time on your hands, read “Grain Damage.” by Douglas Graham.