Some fair points being made there. This line raises a few pertinent questions, however:
They only need Melo to come in and do his job as the fourth or fifth piece for this team to get better, not be the superstar from 10 years ago.
We know that Melo doesn't want to come off the bench, but even if he starts, is he going to be content with the role of being the fourth or fifth player in the pecking order? Can he be at all effective in that role? Can he, or is he even willing, to tailor his game as necessary? Does he expect his 15 field goal attempts per game from last season to be there in Houston (effectively replacing Ariza and Mbah a Moute's attempts combined)? Even if he doesn't set them back, does he move the Rockets forward at all?
Again, I think there are some fair points being made there. If Melo is willing to accept that lesser role and can find a way of being more effective and efficient in it, it could possibly work out. On a one year deal, there's not as much risk, either. At the same time, I believe it's fair that people are sceptical.