Seriously though, that is part of the problem.. great composers are elevated to such a status that collectively we are disbelieving of the possibility that any current composer (not me, in case anyone still thinks I'm suggesting that) could be as good as they were.
I was actually originally going to respond with this, but I sorta changed what I was saying and said something else. Fascinating story, I know, should I tell it again?
But exactly, I mean, look at Rachmaninoff's earlier works...for instance, he wrote 3 nocturnes at around the age of 14, I think...they are amazing, I think, especially 1 and 2, but they are very simple (not minimalist however), and I could easily see someone on this forum writing them. But Rachmaninoff didn't stay at that level forever, obviously. He refined his technique and eventually wrote some of the greatest pieces in piano repertoire! There's no reason someone couldn't do the same today. And maybe some people have started to do the same, but given up before they got to his ability because everyone says "No, you'll never be as good as these supernatural beings that lived 100+ years ago."
The cost thing is pretty relevant too.. if I had a substantial body of work and wanted exposure I'd probably have to pay someone to play it and give the scores away free for several years.
Perhaps, if you ever created enough music, you could debut it yourself, alongside other pieces people will go to see? I'm not sure what your position is so I'm not sure how easily you'd be able to have a concert, but it's something to keep in mind.
PS Chopin's not that great. You could be better than him with a little effort