Imagine we played Isaac during the first game of the season, while being 100%, and he tears his ACL, just to start the season 1-0. It's sports injuries can happen anytime.
The Isaac situation is different than the Fultz situation. They have continually mislead the fanbase about his injury as if we are a bunch of idiots.
If Fultz isn't ready he isn't ready. That doesn't change how overly cautious management has been. Which is fine but could also be considered a bit extreme.