As a general rule, the creationists we see here just repeat what they read on creationist sites, never understanding the material, and definitely not understand why that information is false. From these types of interactions alone, it is pretty easy to see that the reason they believe in creationism has nothing to do with the scientific evidence since no honest appraisal of that evidence would ever lead to the conclusions they hold. It is more a case of Christians putting their faith in other Christians (i.e. creationists), and those Christians letting them down.
Even worse, when we discuss topics like genetics, phylogenomics, radiometric dating, and so on, they rarely show that they understand the basics of those fields. For example, we once had a creationist who tried to claim they were an expert in genetics while not understanding why bacteria do not have recessive genes.
Any informed discussion requires the participants to at least be able to get the gist of a primary paper and be able to discuss how the data presented supports the conclusions. I have rarely, if ever, found a creationist who is capable of doing that. At the same time, many of us on the evolution side can and do read the primary lit and understand it. While it may not require a masters degree in the specific field of science to read peer reviewed paper, it is a rather large hurdle for the newcomer to get over.