Well, there you go, you know that Greiss's reflexes weren't better. You have no idea what kind of coaching the goalies received or what flaws in their games might've been fixed. And I'm not a goalie coach guy, I don't really believe that goalie coaches do a whole lot other than keep a goalie's ability where it is.
You usually give me a good exit point from these discussions and this is a good one. This is a completely absurd conclusion to make. How the **** do you know that? How in the world can you make that claim without any evidence at all? You have NO EVIDENCE. You are just SAYING THINGS.
And somehow always your 'just saying things' is supposed to make more sense - and everything is black or white.
Your only "knowing" of things is:
"Hey look, his SV% was this, and now it is THIS - so he's been a better goalie."
Do you see how narrow, and exclusive to thought this is? It implies a cause-effect that just isn't there. All of your assertions are built on this empty air.
Again - I put forth: What is more likely: 3 run-of-the-mill goaltenders get great goalie coaching and SUDDENLY find themselves, or they go from terrible defensive teams to those who's play is beneficial to goalie success? I think Greiss and Halak alone make a pretty strong case that the Islanders of 2017-18 were a terrible defensive team and that they vastly improved in all areas - but.. hey, just go against pretty much every professional opinion out there to cling to your stat.