What does learning mean if we understand the biological processes that underlie it? The same thing it has always meant? It's not like understanding addition g

What does learning mean if we understand the biological processes that underlie it? The same thing it has always meant? It's not like understanding addition grants us some brilliant revelation that changes the "meaning" of multiplication. I fail to understand why the meaning of learning would suddenly change because we understood how it worked. (Side note: I'm not entirely certain about how you're using the word "meaning" here; are we talking about "meaning" as in "definition of", or "meaning" as in "metaphysical significance or purpose", or something else entirely? Eh, in either of the first two cases at least, my opinion's the same.)