It's absolutely wrong. Both normatively and pragmatically. You know the shtick, real wages haven't risen in aeons, inequality is rising, the poor are being shafted. Moreover, even if it isn't true you still need a cogent economic message, Trump had his, Democrats need one too and there's none better than going after the undeserving rich.
Also infantilize young people as much as you like, not going to change the fact they are massive, active and ever growing group who might have actually felts some hope that a candidate could offer them a world where they didn't have to work their ass off to play loans while their homes become gradually inundated under waves.
The sort of elitism you display is really inimical to your case