I agree with what says, especially this:
No one would be so stupid to use pirated assets (which it is if you would refund it and use it) in a commercial game, really. Not just because of getting sued, but also imagine the news if a game would be found to use pirated assets. Your game would be burned for the rest of its live and your whole name would be, you could never release a game again without people reminding everyone about what you did. So that’s really not an.
And if someone really would want to do that, then directly downloading the pirated asset from whatever website is way easier than going through the full refund process.
I think Epic should let people refund assets within 2 hours, like Steam does. Buy, see if you like it, if not return it.