TLDR: It would be a shame if we just cross our fingers and hope everything goes well in Space for the next 100 years. Also maybe we can all play nice and one day have a space elevator or 10. Its stimulating to imagine the far future when we are orbiting suns throughout the universe, but until then we first have to play nice and figure out how to reliably get off of Earth.
If the future of humanity is dependent on moving beyond earth, then any longterm plans are dependent on us being able to regularly escape Earth's gravity well with ease and low cost, at least while we are still dependent on Earth.
Ignoring any Deus Ex Machina like an AGI that comes and sorts out all of our problems, we will have to make sure that escaping Earth's atmosphere remains possible based on our own efforts and problem-solving. Not getting the next 100 years right could be a type of "lock in" that is frustrates future human flourishing.
Currently the main issues I see for access to outerspace.
One (of many, surely) Assumption: Anthropcentric focus, I am not sure if I actually believe humanity should be separated categorically from our ecosystem. When I say 'we', I am saying whatever we decide is 'us' will probably go into space eventually.
If you are interested in this topic get in touch, I want to begin writing a series of posts first establishing why space is important and explaining immediate concrete issues that we need to address before becoming an extra-earth phenomenon. Its stimulating to imagine the far future when we are orbiting suns throughout the universe, but until then we first have to play nice and figure out how to reliably get off of Earth.