It would be. Dust (Mars and the Moon) is a huge problem that we might struggle with for a long time. Any form of terraforming, well…we’re very good at accidentally doing that, but a purposeful change towards a goal of making it nearer to Earth-like, that’s a complex thing. And there is the Red/Green Mars argument to have if we ever did.

What would be even easier is to just bring materials to a spot and build lots of huge habitats. We’ve had blueprints that are still reasonably valid since the 70s and even before, it’s just getting the small percentage of materials we can’t find out there already into space that’s difficult. The plus over a natural body is that you don’t retrap yourself in a new gravity well to fight, and you can locate anywhere with whatever environment you can maintain. The plus over the captured asteroid is you know what you have from the beginning since you’re build it, and you don’t have to use a lot of effort to capture it, derotate it, mine it without ruining its ability to hold atmosphere.

My opinion is that we still could do this type of thing technically, but the window has shut on the will to try. We can’t even stop damaging this planet.