The creator of this fake has been spamming threads to make it seem like people believe it, right? There's no way this fanbase has gotten so dumb to just blindly believe every concept art sheet, right?

An actual leaker wouldn't carelessly take a photo that exposes their surrounding items/workspace. The amount of people with access to such confidential information at this point is small, so it wouldn't be difficult to use this to track them. There's a reason that the previous starter leaks showed the Pokemon and absolutely nothing else.