Seems fairly rare to hear of someone having a knee, etc that bothers them for years provided it’s been properly treated. But hear about “bad backs” that people fight for decades.
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One of the big issues with our backs is that we walk upright on two legs. Our spines evolved over millions of years before we walked upright to support walking on 4 limbs…. in the distant past 4 legs and after that two legs and the arms still used to assist in walking like in the other great apes.
This means that over time our backs will get damaged just from walking upright like a human. Even when things are treated people will of course go back to the whole walking upright thing.
Walking upright puts stresses on the spine that it hasn’t evolved to handle.
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