Writing about music, someone who may or may not have been Frank Zappa remarked*, is like dancing about architecturet, but there are, indisputably, reasons why people might be moved to express their reaction to some form of artistic endeavour in the realms of another.
So writing about music might be like dancing about architecture, but there are reasons why people will do it.
*I'm talking the original source of the remark here. It's the sort of one-liner that tends to get repeated extensively by point-making smart-arses.