Charles Darwin addressed the question, suggesting that the original spark of life may have begun in a "warm little pond, with all sorts of ammonia and phosphoric salts, lights, heat, electricity, etc. present, so that a protein compound was chemically formed ready to undergo still more complex changes". He went on to explain that "at the present day such matter would be instantly devoured or absorbed, which would not have been the case before living creatures were formed."
thus the idea that prebiotic chemistry would just be absorbed into biotic chemistry when evolution had reached that level, was born. I must admit that it appears self evident. However, I can imagine progressions of events that would indicate completely the opposite- ie, that in the environment that life evolved/developed, not only would biota not destroy per-biota, but would rely on its function to such an extent that it could not. Just as we could not survive if we destroyed every bit of bacteria on our body.
Oparin proposed that the "spontaneous generation of life" that had been attacked by Louis Pasteur did in fact occur once, but was now impossible because the conditions found on the early Earth had changed, and preexisting organisms would immediately consume any spontaneously generated organism.
Again, the assumption comes in that spontaneously generated organisms could not survive alongside existing organisms. The point is, since we cannot know whether this is the case or not, because we don't have the slightest idea where or when it happened, nor the exact chemical composition when it happened, we could certainly not prove it, nor even give it a probability. Perhaps parsimony which dictates that we assume life started on Earth would follow with the conclusion that, since there is not even a scrap of evidence for prebiotic evolution here, that biota had an evidence destroying capacity in that regards, much as some species can disappear without a trace. However, if one accepts biogenesis happening elsewhere, we would have to assume that we could find evidence for it at that location, even if there is also biota at that location.