No, ideally the brain itself (at least) can actually be revived and made to be medically stable. Which assumes the preservation process does not cause too much damage.

(and also it's vitrification not freezing, though reversing it is still not something that has been done obviously)

I mean sure, some people are fine with a brain scan (and cryo companies might just say that to temper expectations)... but that sounds like idiot talk to me. I say this as someone who has thought about stuff like this for escapism reasons, not that I have any chance of covering even a reservation fee.