You make the most profit by coming up with life-saving medicine, making a boatload off it, and putting your competitors out of business. The company that cures cancer will literally destroy their competitors. From that point on they print money. And think of the good will and brand value from a move like that.

They don’t need to keep us sick. There will always be new diseases and new ways to get hurt. Evolution and stupidity see to that. And if they did solve for that somehow, then their focus would be on keeping us alive and healthy in old age.