Because we are human bodies, with all the intuition and wisdom that entails.
It's less intuition and wisdom than many people think; gut feelings for example should be examined, though they're often telling you something important.
I think it's reasonable to infer that, as we are human bodies, we would know how to make ourselves stronger. The idea that mental exercise keeps the brain sharp comes from a similar intuition; it is not surprising to see it confirmed through study.
Why, exactly, would it be reasonable to infer that we would know how to make ourselves stronger, just because our bodies are where we live?
Sure, you could say that mental exercise keeping the brain shark comes from intuition. And I could say that it's intuitive that mental exercise depletes the brain and makes things worse. I don't see how you decide which one is right without going out and studying it.
One cannot, of course. It would be somewhat fatuous to be surprised that exercise makes one stronger, when it has been advocated for thousands of years as the (only) method for doing so. This is as true of mental exercise as it is of physical.
It is not typical of our community norms to downvote reasonable arguments you disagree with. Just FYI.
I'm not talking about "surprised" or anything. I merely object to "intuitive", both in that I don't see how intuition supports this, and I don't think intuition is worth anything here anyway.
Don't assume the person downvoting you is the person you're replying to.
It's less intuition and wisdom than many people think; gut feelings for example should be examined, though they're often telling you something important.
I think it's reasonable to infer that, as we are human bodies, we would know how to make ourselves stronger. The idea that mental exercise keeps the brain sharp comes from a similar intuition; it is not surprising to see it confirmed through study.