That is to say, epic poetry has been invented many times and independently; but, as the needs which prompted the invention have been broadly similar, so the invention itself has been.
It's much easier to work on other people's music and play in other people's bands as a guitar player instead of being the main songwriter and singer. That's a really big job to do that.
Hurry boys, hurry, we have to make a quick change or the hour will be up.