You know who I bet hates the phrase "the blind leading the blind"? Blind people. Like they can't get around by themselves. Also: who better to teach a blind person to get around than a blind person who already knows how to get around?
You know who I bet hates the phrase "blind as a bat"? Friggin' bats, man. Can you imagine if they learned English and found out how we talk about 'em? If I were a bat I'd be like "Fuck you guys, deal with mosquitoes on your own."