Please don't think I am in any way criticising you or belittling you. That really is not my intention or my style.
We all do what is right for us and no one has the right to say otherwise.
I buy originals but that is my choice. Everyone is different.
Yes I think people who get up there and DJ should play originals only. But that is my personal opinion and there are plenty of people out there who feel differently.
I only go to venues that feel the same way about things that I do, but again that is my choice.
This is a very large scene, with enough venues to satisfy all tastes and personal choices.
Just enjoy yourself. That's what I do.
All the best to you!