Karaoke is music in the sense that painting by numbers is art. It's music in the sense that putting a frozen meal in the microwave is cookery, in the sense that building an MFI flatpack is woodwork, in the sense that spending a fortnight drinking in Ibiza is travel. In the sense that watching Big Brother is life.

Worse, by limiting what is acceptable to perform in public to pale imitations of commercial music, it reinforces the idea that only music marketed by entertainment companies and paid for by the consuming public is legitimate.