What Harry doesn’t know that canon Harry figured out quickly is that Hagrid knows a lot about magical creatures. (He eventually became care for magical creatures teacher, after all.) He ventures into the forbidden forest, tends the nonmagical part of the Hogwarts gardens (which get attacked by magical creatures on occasion), etc. And if Harry did more digging into the Chamber of Secrets incident, he might learn about Aragog.
Knowing most of this, though, requires Harry to actually interact with Hagrid more than is strictly necessary, which doesn’t seem to interest him.
What Harry doesn’t know that canon Harry figured out quickly is that Hagrid knows a lot about magical creatures. (He eventually became care for magical creatures teacher, after all.) He ventures into the forbidden forest, tends the nonmagical part of the Hogwarts gardens (which get attacked by magical creatures on occasion), etc. And if Harry did more digging into the Chamber of Secrets incident, he might learn about Aragog.
Knowing most of this, though, requires Harry to actually interact with Hagrid more than is strictly necessary, which doesn’t seem to interest him.
Either you are making a pun about the ability to identify said creatures by smell or you mean “knows”.
Ehehehehe, that was a mistake on my part, thanks! Fixed now.