It likely won't, that's true. My point remains though: With storage that cheap and lossless audio sources widely available, why would you not use the lossless option?
MP3 is more widely supported than any lossless audio codec. Lossless compression enables the collector to keep an original.
Not everyone is a collector though - for them, MP3 is probably fine, and if they need a different format later they'll probably just stream, re-encode, or re-purchase, in order of likelihood.