Sorry, I'm greedy when it comes to my own wellbeing. Do I really care how sustainable my diet is if I have to suffer for 20-30 years with ailments the can be ch

Sorry, I'm greedy when it comes to my own wellbeing. Do I really care how sustainable my diet is if I have to suffer for 20-30 years with ailments the can be chalked up due to the deficiency of the diet itself?