Can you not disagree without condescending?
Anyway, Steamer is just picking up on the fact that his xFIP was almost 5 this year and ~4.2 in the NL in 2014, and given that he's 33 in July, he's probably not going to see a change in talent that will drive that down. I'm a lot more willing to bet on his 2016 ERA regressing towards his DIPS. The alternatives are to either a) expect his DIPS to improve significantly, or expect him to continue to outperform his DIPS by close to a full run, which is unprecedented as a skill.