The main argument is that mostly civilizations don’t become space faring or rather perhaps becoming space faring may be close to impossible.
Being able to leave your home planet in a functional, safe & unimaginably fast aircraft is one thing, but pockets of civilizations surviving on other planets is another. No one has a clue how terraforming a planet would look like on a much more developed level, but it’s plausible it’s basically impossible to do without waiting thousands of years for your compatible life to establish a proper ecological cycle.
Basically no one has proven yet that it’s possible to build a small self sustaining habitat on any planet. Elon talks about going to Mars, or used to anyway, but this is an important problem. Can you imagine humans for real building a megastructure on Mars that can sustain a settlement? It feels way too problematic tbh, even if you had 10% of the World’s GDP to give it a good go.
The main argument is that mostly civilizations don’t become space faring or rather perhaps becoming space faring may be close to impossible.
Being able to leave your home planet in a functional, safe & unimaginably fast aircraft is one thing, but pockets of civilizations surviving on other planets is another. No one has a clue how terraforming a planet would look like on a much more developed level, but it’s plausible it’s basically impossible to do without waiting thousands of years for your compatible life to establish a proper ecological cycle.
Basically no one has proven yet that it’s possible to build a small self sustaining habitat on any planet. Elon talks about going to Mars, or used to anyway, but this is an important problem. Can you imagine humans for real building a megastructure on Mars that can sustain a settlement? It feels way too problematic tbh, even if you had 10% of the World’s GDP to give it a good go.