No, it isn't. It's realistic.
I'm sure they know Juventus would be back up within a year anyway so they didn't left. Would they stay if Juventus weren't allowed to go back to Serie A? The Italian FA could deduct a bucketload of points at the start of the season to make sure you don't go back up. I doubt it they would stay if a club in Serie A wants them, if that was the case.