I don't think this intuitive paradigm is right at all - or at least it isn't right if we're using your man-in-street defs of pop and indie! For one, there's the gig, which is often assumed among indie-ists as being the best setting for song X, which is a lot about communal experience. Indie for indie-discos isn't for sitting in yr bedroom but for hanging out and dancing with yr mates.

Also people seriously INDIE EVANGELISM, it is strong and it is there, the difference I think is that indie sharing of musical knowledge etc is more hierarchical - the granting of information, the educating of others in what is the 'right' music, the recognition of other gatekeeper types by certain codewords and handshakes - whereas pop sharing of musical fu is more a dissemination, more taken for granted, somehow more egalitarian.