I'm a metalhead, and I can't even count how many albums I've heard where the production ruined the experience. I think the people who talk about listening to it exactly as it was recorded are making a few fatal assumptions, namely that the equipment used to record was accurate, that it was set up properly, and that the producer knew what the hell they were doing. We talk about headphones and speakers accurately recreating the sound of the instruments, but that's only valid when all the instruments were purely analogue and when the producer had all of his levels right. It's a nonexistent ideal. You put two dudes at the board for the same recording and you'll get two different products.
Yeah, this is true too. There are so many albums that just sound so bad, it messes up the listening. And the point of exactly how it was recorded is a great one. There's no perfect replication, especially when it comes to that kind of music. It really relies on so many things that we don't have control over, like you said, everything being set up properly and the producer knowing what they were doing. All that stuff.
That's an issue I have with it all, because I see so many times on advertisements or on here or wherever, people saying they want to hear it like the artist intended. I just think that there really is no way to hear it exactly like that without being there, because there's so many variables that affect the finished product.