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Stupid question I am sure, but I also believe there are companies that can save a computer's hard drive and everything on it even when it is thought to be destroyed.You are correct: there are, in fact, such companies. Unfortunately (as Warren mentioned two posts before the one you quoted) sometimes horrible things happen when you take your machine in for data recovery. Like:
(which, I'd remind people, culminated in the 20-year-vintage top local computer shop closing down with the staff vanishing to the four winds after the proprietor evidently died on an operating table in Germany while my machine was still there undergoing data recovery, the shop now boarded up and no-one anywhere having a clue where any of the computers inside disappeared to)