I think it is horses for course (so to speak). I am very careful about raw/cooked chicken and cooked rice, in particular. But other things, dairy products, other carbohydrates, I work on the sniff, touch, use my common sense basis.
Blue cheese gets its blueness from mould growing in the cheese, which is then eaten with relish by most people. Grapes affected by the 'noble rot' are considered to make a superior wine. The best beef and game is hung for three or even four weeks. Dry ageing of beef encourages a specific fungus to grow on the surface of the beef, that improves its flavour.
Given that each of us has about 2lbs of bacteria, fungi and other microbes live in our bodies, being over sensitive about sell by/use by dates, is rather like shutting the gate after the horse has bolted.