That's where using your brain comes in, knowing how long it's been kept, at what temperature, and how fresh it was when you got it. Although I think the above is overstating the case, especially if the meat is cooked properly and is being consumed by someone in general good health. Having said that, I'm not interested in keeping meat on the boat; it's an occasional treat when we eat out, not something we feel the need to have every day.
Yes, well, everything's out to kill us - you pays your money and picks your poison. Mine's sunshine, with a side order of beer. And diesel fumes.