I think the is because buyers who requested the refund just gave flimsy reasons, and Epic accepted it. The people behind Epic should be more diligent in approving the refund, and therefore, sellers are not contacted unnecessarily.
I know it is easy to get agitated when the products are said to be defective (more so when the reasons are just not…well reasonable) after pouring some dedicated, long hours…
And also, the piracy concern is quite valid to me as you cannot compare the refund policy of say, wall mart. Malls like wall mart get the goods back physically (therefore no questions asked is okay). But this is digital product, and quite niche too - the buyer should be reasonably well informed before buying it.