Sounds like a great approach.
A couple of points that will hopefully make things clearer rather than murkier.
(1) When 'they' say that something is bad for us, they often mean it's bad for us
in excess, not that we should avoid it entirely.
(2) Things are often good and bad for us
in different ways. Fatty ocean fish is great because it contains Omega 3 essential fatty acids, but contains mercury. Red meat is full of iron and other nutrients, but increases your chance of bowel cancer.
Both these things indicate that moderation is key. Of course 'moderation' varies from food to food - a moderate amount of butter is a lot less than a moderate amount of lettuce.
