Earlier quoted context omitted.
As far as I know you need to be dead already to be put in these facilities. So to get them back, we'd have to find a way to resuscitate them after "defrosting". The point of these facilities is exactly to wait for the technology to get them back to life. One more interesting variation, while illegal, would be to freeze people when they are nearing death. If we could bring them back later, the scheme would have a chan…
They already do that.
They basically have you fill your bathtub full of ice, pop some downers then jump in the tub.