Agree to disagree then. For me, a goalkeeper will never be vital to the overall game plan. It's vital to have a quality goalkeeper, and they do save you, but they save you when your gameplan fails. If the opposition is getting chances constantly, that's the gameplan failing. If your goalkeeper has to make countless saves, that's the gameplan failing. If your star outfield player is constantly making things happen, that's the gameplan conceding. Surely you can see there's a big difference in that? One is using your best player to score goals, the other is having your best player need to stop the chances that the team already failed to prevent.
Edit: Or just like Gbenger said above. Mourinho said it himself. A goalkeeper winning player of the season means the team had a shit season and something isn't working. Ideally, you don't want your goalkeeper to ever have anything to do.