DEFENCE WINS CHAMIONSHIPS PERIOD!!!
Grant Fuhr was a little above average, he is after all a hall of fame goalie. Your logic is twisted all the teams you mention have had future hall of fame goalies in between the pipes when they won the cup, the only exception is the year Detroit won the cup with Chris Osgood. Dallas: Eddie, Pittsburg: Tommy and the reason these teams also won the cup is because their coaches stressed defence first. with Scotty responsible for many cups. Lets look at the teams that have had great offence in recent history, but have not been sucessfull in the playoffs with out a great goalie. Flyers last 5 years or more No goalie no Cup !. The Blues last few years and this year, no goalie No cup! Ottawa no goalie no cup!! Want to go back even Further to prove that goalies win cups, Flyers Bernie! Cup!! Islanders Smith Cup !!
So yes you need a good team to win the cup, but without goaltending you will be an also ran. Me I will take a good team with a great goalie over a great team with an below average goalie. If you want proof of this in girls hockey look at the Midget Etobicoke AA team with Kessler in between the pipes. A average team at best, but a Great goalie! Look at where you have them Rated!!