I mean fixing these things can definitely increase sales, but you're right not in the sense that they are directly marketable. The thing that makes games really blow up is word of mouth, people recommending them to their friends, and you get that best by making a game with overall quality. It's basically a given at this point that Bethesda games are buggy messes that get fixed by modders. Every time you have a major bug, game crash, or save corruption it takes you out of the world and forces you to remember you're playing a game that barely works, which makes you like it less. All of this hurts sales, if not today in the future. So yeah, they probably aren't prioritized by management, but management is wrong. They often are.