This doesn't even work as a metaphor. I absolutely would not jump on the chance to ride on a literal rocket ship without asking a hell of a lot of questions first!
The whole speech was probably written by AI anyway </sarcasm>
But here, back in the real world, with one life to live, majority of people will simply refuse because they have lives and sane interested person asks a lot of questions. I mean, was he one of early Titan submersible passengers? And that one guaranteed quick death rather then prolonged one or slavery or what have you.