This brings the interesting question: how many failed experiments are being "replicated" just because the past failed attempts are not published? Said different

This brings the interesting question: how many failed experiments are being "replicated" just because the past failed attempts are not published? Said differently, how many researchers are wasting time on something that is bound to fail, like all the researchers that happen to have tried the same idea in the past failed, but didn't publish, because who wants to publish failure?