That's not quite how I meant it: when you have a franchise goalie, you can concentrate on addressing other weaknesses. It's something that you just don't have to worry about, year after year. It adds stability to a franchise, and makes everybody better. It's peace of mind. Remove Shesty from this team and replace him with an average goalie. Do we even make the playoffs? Unlikely. Add him to Edmonton or Toronto and what do you have? Serious Cup contenders.
Of course, a QB is an "initiator" and a goalie is a "reacter," so the analogy does not really hang true. No doubt that a dominant #1 center gives you a heads up on opponents but a #1 center might only be on the ice for 1/3 of a game and in that time, might be in the offensive zone 60% of the time. But even Matthews or McDavid cannot carry a team single handedly to a Cup. And over the four rounds of playoffs, anywhere from 16 to 28 games, even the top centers are not going to be at their best every night. Yes, average goalies do win Cups, and I happen to think that goalies today are better (much better) than at any time in my 60 years of being a fan, but still, tell me that you would not want to go into a playoff round without a top tier goalie?
But again, I meant that having a franchise goalie is the heart of any team and allows for a GM to shore up other areas. Remove Shesty, or Henrik from all our great teams of a decade ago, and we are nowhere as successful as we were.