Reminds me of this time when I bought a box of andes mints circa 2007. The glue that was used to hold the packaging closed was all over the chocolate. It wasn't a big deal, but I was disappointed and I wanted to let them know so they can fix the problem.
They wrote back to me saying, "Don't worry, the glue is edible." Ok cool. I don't want to eat the "glue", but I think they missed my point. So I reply suggesting people probably don't want to eat the glue so they should fix the production issue to improve the quality of their product, even if it's just aesthetic. They wrote back asking how much free product would make me happy. None. I didn't want anything for free, I just wanted to make them aware of the problem. But they're operating on the assumption that everyone who complains is a bad actor who wants something for free.
But sometimes a money back guarantee is just a good channel to get valuable feedback, if you're willing to accept it.