OK - I do know the difference between fruit and vegetables. But this reminds me of the TV programme I once saw on morbidly obese people. One person was reported as saying that he didn't understand how he was morbidly obese since he only ate oranges. It turned out he ate 50 of them a day. The person telling the anecdote said - if you eat 50 of anything, you're going to become obese.

To the OP - yes, you did throw away a perfectly good tin of tomatoes. But if that's the worst thing that happens to you this year you're a lucky man. Learn from it, but don't dwell on it.