This is the problem with modern jazz. Treating it as some kind of canon is the antithesis of what it was in the first place. It's tantamount to writing down a conversation between two ancient philosophers and repeating it ad nauseum, expecting some new insight. Keith Jarett wasn't concerned with the stuff Art Tatum had done. Miles Davis wasn't trying to build on Louis Armstrong's rendition of Wonderful World . They w…
Learning songs written by other people is something every musician does. There's nothing wrong with playing covers and being able to play music that's familiar to your audience is essential for many working musicians.
That doesn't mean you have to play old standards when you could riff on newer music, but it also doesn't mean you can't. There's nothing wrong with reviving a tune written a long time ago and putting your own take on it.
Music is not necessarily more enjoyable just because it's brand new. It can be just as interesting if it's new to you, and there's plenty to explore.