He's the same age as Draisaitl who signed for $14 million. Is he $3 million worse than Draisaitl? No. He really isn't.
You're comparing different positions, one with which has substantially higher supply than demand.
In fact, bringing up Edmonton is the exact example why very few teams want to invest even 10M in just their starter much less 12+. The Oilers were quite literally a game away from winning the cup with a goalie
significantly worse than Shesterkin.
Yes, yes, if they had a better goalie maybe they win but, ironically, goaltending wasn't their problem against Florida. The point still stands that an upgrade on Skinner to Hiller (4.9M), Demko (5M), Hellebuyck (8.5M) or Vasilevskiy (9.5M) would achieve the same thing but with FAR better cap flexibility.
Regardless, you don't compare Shesterkin to Draisaitl. You compare him to other goalies, none of who make remotely close to 12M+ or are that much of a downgrade, if any at all in the case of the latter two.
I don't blame Shesterkin for trying to chase a payday. I just don't think any team, Rangers included, are going to give it to him.