Your comparison is WAY more terrible than my own.
A mission to a dusty rock while your own beautiful planet is dying is a weird way to help a tech bro claim more tax resources for himself.
Exploitable constrained human power shipped across a sea by way of a costly, lossy transport system. Colonising the Americas without a latent labour pool and social hierarchy to swap over would have been near impossible for pre-industrial Europe.
It would have required long-term support across months of shipping and communication time for purchase of unknown resources in unknown time scales in respect of unknown risks. Sound familiar?
Except they weren’t, and they aren’t.
…like Mars. Hence the analogy.
At the 1400's tech level it was not an easy voyage, maybe easier than going to mars at our current tech level, but not a lot easier.