If you're trying to protect yourself, then do it right and don't just pay lip service; protect yourself against abrasion and hyperextension. The only downside is the upfront cost in boots that offer maximum protection with current knowledge and technology have an expensive initial investment.
It pretty much comes down to this: do you want to pay later for hospital costs or right now for quality gear? Like Alex said, some crashes are beyond the scope of even the best gear. All we can do is put forth our best effort to protect ourselves against reasonably foreseeable incidents.
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