Responses
By having a cane, people can immediately tell that the person is disable, regardless what kind of disability they have. Imagine if the person is deaf but don't have a cane, when people calling out to him, people can have misunderstanding like maybe he's being arrogant, don't want to bother.
So by having cane actually helps a lot. Not necessarily must be blind. That's what happened in my country, the moment we saw a person with a cane, we'll be extra careful, doesn't matter what kind of disability.
Im just confused as to why Tooru needs a cane... Doesn't it look "pretentious" for a seeing person to have a cane?
Anyway, Kazuha really went for it to tell Tooru about seeing himself as a victim and looking down on disabled people. Also, it’s a nice gesture to learn Sign language together and well, form a romantic relationship <3