I realize that students don't think this way, but they could do a few things before the end of the semester. They usually find the time to get drunk or go to Starbucks for a hit of caffeine.
Starbucks is a lot easier to swing by then trying to get boxes to haul things away. Also in my experience the dorms don't let you bring by rented trucks or vehicles in the loading zone unless it's your assigned move out time slot, so you can't really do that mid semester. you could carry things by hand slowly somewhere, but it's going to be much more cumbersome.
They're also studying for finals and working on end-of-semester projects. And yeah, they're still kids and time management is a thing you learn at this age. But the last 3 weeks of a semester go by incredibly fast.
I mean, you're looking at almost a month out or so given the extra stress of the end of the semester with finals and projects. And the semester is only five months or so to being with.
It's not really realistic to make this a moral issue, IMO.