I personally don’t find it suspicious; if any field were bent on finding proof and full of people happy to come up with a hypothesis to tear down another, it’s science.

So what about examples derived from fossils, or diverged species? As in, you can see that genetically and physically two organisms are close, and there are examples of shared ancestry, but the two species are specifically different? I’m currently thinking the difference between the Przewalski’s Horse and ordinary horse.