You can live more than one life time and not know everything about music. This shouldn't stop anyone from continuing to learn, classic, jazz, folk, trad,, pop, it's all music and some of it more interesting than other of it but worth every bit of study to get better at no matter what you like or play. Critics for the most part usually get in the way of creative musical activity. There are a few who are able to point out the developed aspects of music that is worthy of listening.