The whole Mitch Marsh situation encouraged extremes, from the selectors backing his 'potential' in the face of poor form to over the top criticisms.
As for Faulks, I don't think it's hilarious to back him in for a chance. His shield figures are better than Marsh's across the board and a lot of those that don't want him to play are basing it on 'gut feel' that his technique is somehow not up to Test cricket while Marsh's is.
Actually it's based on guy feel that neither Marsh or Faulkner should be in the team because we should be playing 6 batsmen.