They have been the best story in sports; there is no other way around it.
It starts at the top, with general manager George McPhee and coach Gerard Gallant. McPhee did an excellent job constructing the roster and Gallant got everyone to buy in and play as a team. As a result, almost every player on the roster had his best season. Vegas steamrolled to the Pacific Division title and needed 15 games to advance to the Cup Final, a remarkable feat for any team, let alone an expansion team.
Have we ever seen a team that went five goalies deep and did this well? When No. 1 Marc-Andre Fleury was injured, the Golden Knights relied on Malcom Subban, Maxime Lagace, Oscar Dansk and even Dylan Ferguson and still had success. If the New England Patriots lost Tom Brady and had to play their third-string quarterback, or if the Cleveland Cavaliers lost LeBron James and had to play their third-string small forward, there's no way they would have sustained the success Vegas has.
As I've said before, people discrediting what the Golden Knights have accomplished don't really understand the fundamentals of hockey. You have to earn everything in this game and Vegas definitely has done that.