Don't worry, in 5-10 years it will be good for you again. I still remember being lectured in school on the food pyramid and the importance of getting your 8-10 servings of grains a day.
While the grains thing was particularly stupid advice, recommendations haven’t changed as much as you’d think. The guidelines from reputable sources as far back as the 60s and 70s were fine. They didn’t understand how deadly refined carbs were, but recommended eating fruits, vegetables while limiting desserts and too much fatty meat; now you might be eating a bit too much carbs without understanding the risks, but yo…
Why is it silly? A lot of things are dose dependent. A small amount of tylenol makes you head feel better. A lot of tylenol kills you. Lifting weights is very good for your health, but if you overdo it, you can get seriously hurt. A stressful day here and there is harmless, but if you're under constant, chronic, stress, your health will deteriorate. Four hours of sleep will leave you feeling terrible, 7-8 hours will leave you feeling rested, and 14 hours will likely leave you feeling terrible. I could go on, but I'd argue that dose-dependency is the rule rather than the exception.