Unfortunately, that's true with the retailers who do refunds with "change of mind", or accept items that have been opened or used, because who's going to pay full price on something that has been opened...
For marketing purposes, it is assessed that it would generate more sales from the peace of mind of returnability, to then offset the increased discounts they have to give to the extra items that people won't touch at full price. (especially if the items are swapped out or parts could be missing or broken)
But if a store has a policy of not accepting items that have been used or opened (like games or movies), returning something that a person has resealed to look like it was never opened, would then be wrong.
(and if they do accept returns, I think it would be on the understanding that they weren't used, like clothes or underwear)
But this is all moot, as the original comment was more like an off the cuff speculation, not encouraging it or recommending it.