I hear this from cryo skeptics all the time. Doubts -- not so much as to whether it >works or not, but as to whether the patients who could be revived are human or not.

No, the question is whether the advanced posthuman civilisation will see the frozen primitive men as human beings.

How many resources are we spending to save and improve lives of apes?

If cryonics works in the first place, it means everyone who could be preserved but >isn't, is a human casualty

The purpose of cryonics , at least as as advertised here, is to save specifically your life, not humanity in general. And, for the purpose, is simply better to be one of a few rare specimens than one in a mass.

and everyone who could be reanimated but isn't is stuck in a coma against their will.

why would they care about our will?

Death will then be viewed as something extremely uncommon and in need of >extremely good evidence before medical procedures and ethics can be cast aside.

death of one of them, yes, but one of us?