The 25'th person on the roster would matter on playng other teams when they have a number 1-4 starter and the Twins do not.
This is such flawed, aggravating thinking. No one is claiming Drew Butera sank the 2012 season, let's get off that. It's disingenuous and distracting to the real point. Of course he isn't the main reason we're a bad team. But just because you're bad doesn't excuse bad decisions. In part, some of the very same thinking behind the bad decision to scholarship Butera into a roster spot is why this team is as bad as they are. Is he single-handedly or even directly responsible for that? No, but that doesn't excuse the bad decision, which is what is being criticized.
If your manager is going to insist on a third catcher and your highest paid player needs to be a part-time catcher - then you better have one that can be a regular contributor to the team in that role. Especially if you also have a penchant for playing a thin bench.
This represents some scarily lowered expectations for the team. No matter how bad you are it doesn't excuse you poorly constructing your roster.