Then he should've put it in the game since day 1 instead of forcing it on people who were playing on survival before and might not like the new changes.
In any case I think people are looking at this the wrong way, or at least are looking at it without considering that some of the new features instead of only adding challenge(?) to the current gameplay, also add immersion ie. eating/drinking/fatigue.
Some people might wanna take that immersion just for the sake of immersion and not for the added challenge, so locking these new additions on a specific difficulty setting is beyond stupid. At the end of the day it is extremely easy, and not at all time-consuming to create toggles for the new features. That way everyone gets to play how they want.