Terraforming other planets would be astronomically more challenging than fixing our own planet and we don’t seem to be able to get our shit together to do that. Even if we are capable of terraforming other planets, it would take many centuries at minimum. O’Neal cylinders are far more likely to work once we start industrializing the moon.
Was she particularly skinny? A friend of mine with a similar problem explained that because she was very skinny (actual eating disorder), any slightly hard surface puts pressure on her bones (especially ribs) painfully even when doing it gently, and she would feel pain even by sitting on a chair without a pillow between her body and the wood surface. Muscle and fat help coushon and spread the pressure across a larger area so most people don’t experience this pain.