I don’t think it’s laziness, it is somewhat a different form of “elitism” perhaps. Epic wants the marketplace to be better curated than Unity’s asset store. There are tons of junk in the Unity’s asset store because anyone can upload anything. The problem is, if a “wanna-be-developer” shopping around market place can’t tell the difference between quality content and bad content, why would this concern Epic this much? Just put a giant label telling that the content is not approved by Epic Games and we’ll be all fine. Even though there are lots of junk in unity’s asset store, there are also many good examples as well, it doesn’t take rocket science or days and days to find them.