Well yeah, which is why anyone who wants it is kidding themselves. And neglecting what's here on earth, the cowardly, morally bankrupt "dreamers" who'd rather abandon here than fix here.
You've never thought that there are many things "out there" that can really help "fix here" have you?
For a start, there are chemicals and minerals yet to be discovered 'out there' that could perhaps hold the cure to all cancers.
Also our resources are running our or getting harder to obtain - but 'out there' are many trillions of times the weight of our entire solar system in gold, many trillions of times the weight in Lithium, copper, iron....
Also we are getting pressure on food resources - growing enough to feed out population. 'Out there' are resources that would help, especially with less people here - and that would help 'fix here' as less people will reduce overall stress levels - and stress is a known cause of (or contributor to) cancer.
And there's pollution - if we can get some of our manufacturing 'out there' then that will also very much help 'fix here' as there's less pollution (if we can come up with a means of safely getting stuff from orbit).
Think. "Up there is where the answers lie!". Well, many of them anyway.