Superior on Main Pumpkin Pies

Every now and then I used to indulge in chocolate pudding pies which are some of the worst things for you. Not a lot of companies make them so I almost never have new ones to try. 

These Superior on Main Pumpkin Pies are kind of like those only pumpkin pie. They are also very bad for you at nearly five hundred Calories each and they have a whole lot of stuff that I can't pronounce in them. 

They are, likely for this reason, delicious. I ate them before I read the label and now I'm depressed. Why is that which tastes good so bad for you?