Absolutely true. The cryonics meme spread widely is more sustainable -- and thus more useful -- than if only a few people have it.

Not to mention the fact that it could raise the sanity waterline quite a ways. That is a benefit that would be of lasting value (and perhaps steer us clear of a few existential risks) regardless of whether cryonics works.

Obviously if we knew cryonics wouldn't work it would not raise the sanity waterline to pretend otherwise -- but the fact is that we don't know any such thing. It is a quite valid assumption that it will work, as far as we can tell. And the cheaper cryonics is, the less sane the refusal to consider it becomes.