Is it true that foods that tastes great are actually bad for you?

I am 6 ft. 5 in. tall and weigh 235 lbs. My wife never serves or cooks red meat. She also never prepares homemade biscuits or desserts, anymore. She states she is “watching out for my health”. I personally think she has gotten lazy with her homemade cooking, since our children left the nest. She once made a homemade cherry pie with Sweet and Low and it was terrible. Question: Is it true that foods that tastes great are usually bad for you? Your opinion, please and examples.