I'm not really into the same music that Steve Albini is interested in recording, but his ethos is precisely why he continues to get work. He recognizes that his job is to record the band. He doesn't want to be an extra member of the band, or make songs "listenable." He wants to hear the band, and record what they sound like, so that others can also hear what they sound like.
It may be good, it may be bad, but that's not his job. Some people will love it, some will hate it, but his idea that it's insulting to tell a band "hey, I'm recording your album, this isn't going to be popular" is right on. Let the audience decide. And if it sucks? Well, that's also not his responsibility. The band has a vision, let them express that vision.