That's not the point I was trying to make at all. Of course it's not scummy to refund something you didn't like.
What's scummy is sitting there playing through something for dozens of hours, supposedly "disliking it" and then returning it after, despite possibly beating the entire thing or unlocking everything, which is entirely possible with a lot of people who play games based on how they consume said media.
If a game is 40 hours long, it shouldn't take you the entire games length to figure out if you liked it or not, at least that has never been the case for me. I can tell pretty early if I'm going to like something or not. Otherwise if you disliked it so much why would someone torture themselves through the entire thing of something they don't necessarily enjoy.
There is nothing wrong with returning shit, it's scummy however if you engage in such a practice constantly. There are loads of people who abuse things like this, and I'm not exclusively talking about video games either. If you're really cheap and don't mind jumping through some of the hoops that are sometimes required for refunds, you can essentially get lots of shit without ever paying for it. Most people however aren't going to go through that hassle.