Given the amount of already terraformed worlds, there isn’t exactly some kind of overpopulation crisis that would mandate having to go boots in to take new living space. Arcological megacities tend to be rather efficient in achieving high urban densities in both vertical directions which doesn’t require much actual land house to provide sufficient population housing.
Sure, there’s crops, but I think that’s a pretty niche market aimed at hipsters with too much disposable income who would actually buy ridiculously overpriced “organic” food when there’s cheaper synthetic alternatives that give the exact same nutritional content.
Huh.
Well, I guess Achuran farm to table enterprises might be a profitable enough concept now that I think about it.