well I think its a sort of middle class atavistic drive for solidarity. keeps the plebs away. they're not going to bother with these songs where the substance is at very best hidden and in many cases negligible.

so we'll sing it in this daft voice. we won't actually bother learning the words (or the tune) only professionals do that and we're gifted amateurs, who could be professionals if we wanted, but we'd rather be quantity surveyors.