Say for a moment that you have an old sail boat. There’s some heavy weather coming and your boat needs some major structural repairs. So you take it to the boat yard, haul it out and they fix it. But here’s the catch: they do the major structural repairs with what amounts to binder twine and say good luck, and, by the way, you can’t actually sail it for about six months until we know the binder twine worked. “What the heck?!” you naturally say. They just shrug and respond “We’ve always done it this way”. This is a lot like sternotomies.
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