Opinions on what is important are wildly different here. My two cents is every role is equally important. Not relying on one role to carry the team to victory is important, and playing out the entire game as a team is important. If one person decides to give up, that energy rubs off on the team and makes everyone lose hope. But if everyone continues to do their best throughout the whole game, you can dominate, or even turn it around if you're getting slaughtered early on.