I have to disagree with you on this one. It's been just words for years...however, Dak has shown he can lead by doing and being, not just talking. Fans are sick of hearing the words and seeing the same failure time and again. Granted, that's not on Dak, but the fans in question are saying to the team as a whole: Put up or shut up. Lead by doing, not yapping.
At this level and with this experience, the players should NOT have to hear these words to be led. Dak can lead them and does so. Anyone that needs these little mission statements at this level maybe shouldn't be at this level for much longer.