Aren't there people who can hear sounds but not music?
FWIW I've read a study that says about 50% of people can't tell the difference between a major and a minor chord even when you label them happy/sad. [ETA: Happy/sad isn't the relevant dimension, see the replies to this comment.] I have no idea how probable that is, but if true it would imply that half of the American population basically can't hear music.
At first, I found it unbelievable. Then, I remembered that I have imperfect perfect pitch: I learned both piano and french horn; the latter of which is transposed up a perfect fourth. Especially when I'm practicing regularly, I can usually name a note or simple chord when I hear it; but I'm often off by a perfect fourth.
Introspecting on the difference between being right about a note and wrong about a note makes me believe people can confuse major and minor, but still enjoy music.
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