I don't think "less hard on your digestive system" is an advantage but rather a disadvantage. Just like "less hard on you bones" is not really an advantage for astronauts that spend a couple of weeks/months in space.
If you want to have a healthy body you have to put it under a stress level for which it was designed by evolution. I.e. exercise once in a while and don't just sit in front of your computer, eat enough fibres and harder to digest food, etc
If you want to have a healthy body you have to put it under a stress level for which it was designed by evolution. I.e. exercise once in a while and don't just sit in front of your computer, eat enough fibres and harder to digest food, etc