I never said no team has ever done it, I said no team does it when trying to contend. No one expected Vegas to contend this year. It was lightning in a bottle. And your 'they didn't have any other option' literally proves my point. No team tries to do it that way. For the exact reason why they didn't want to do it. So you didn't disprove anything, you just burned down your strawman.
And Doughty? Chara? And don't discount Keith, in his prime he was top 5 in the league. So basically since 2008 the team's that have won it's top defenders were Lidstrom, Keith, Chara, Doughty, Letang and Carlson. Out all the top defnders one is for sure not a hall of famer, and you might not say Letang is a top ten defender in the league. Seems like the teams that have won it over the last decade all had some pretty elite defenders anchoring their defense.