Medical caution to the wind? Nah. Ive looked it up extensively a couple years ago and although there are a lot of varying opinions, I came away believing that limiting an MLB pitcher by 30-40 innings in a year isn't going to save him from injury in enough cases to warrant doing it. I think the practice of limiting innings began a bit ago before the sabr era and that a lot of coaches and managers are now afraid to go against it because everyone will point the blame at them, even though we have had teams where basically our whole rotation has gone down in previous years.
It ia not just saying throw caution to the wind. I really believe youd get more out of an asset like Sanchez by allowing him to just pitch, under the assumption you can trust him to let you know if he gets fatigued. Pitching while fatigues is a big risk from what I understand. If he feels good, he should start basically.