Isn't that a first order effect though? A second order effect would be researching a life-saving drug for a lifestyle condition. You research means people have

Isn't that a first order effect though? A second order effect would be researching a life-saving drug for a lifestyle condition. You research means people have less incentive to live healthily and end up dying even sooner from some other diet-related disease. The disease you cured would have scared them "straight" diet-wise.