This argument basically reduces to, once you remove the aura of philosophical sophistication, "we don't really know whether death is bad, so we should worry less about death". This seems to me absurd. For more, read eg. http://yudkowsky.net/other/yehuda .

Death is bad. The question is whether being revived is good. I'm not sure whether or not I particularly care about the guy who gets unfrozen. I'm not sure how much more he matters to me than anyone else. Does he count as "me?" Is that a meaningful question?

I'm genuinely unsure about this. It's not a decisive factor (it only adds uncertainty), but to me it is a meaningful one.