But the biggest argument against evolution has nothing to do with religion, emotions, feelings, fear, etc. The biggest argument against evolution has come from the fields of microbiology and biochemistry. Just because Creationists can't accept them doesn't mean that they are wrong. Creationists will need to come up with some definitive reasons why these theories are wrong rather than just blanketly disavowing them. It is only a theoretical entity.
Evidence exists trapped in small pockets within the oldest rocks.
Also, we do not have ancient earths, or ancient pro-biotic soups to do tests on in laboratories. No, but we do have evidence of them as related above. Since we have evidence of them, we can recreate those environments and conduct tests on them. Scientists are using philosophical opionion and their fertile imaginations to make conjectures concerning what these hypothetical entities may have been comprised of. They have absolutely no way of knowing these entities existed unless they have a time-machine.