Sorry, that's exactly how it works. You've pushing a claim. The claim needs proof. The burden is those pushing the claim, not the people pointing out that it isn't proven.
You might think that, but young post grads do a literature review not a survey. It might seem morbid, but science is often said to progress when the old guard dies off.
That's not to say it's going to win as the only explanation, just that it needs to be disproven not ignored.
