There are more subtle things than just that. Many important and interesting things are hidden behind different character builds, faction choices, and certain quests/hidden areas. You also have to connect the dots and piece together information that you've collected over the course of the game to figure out things several times throughout the game.
Ok, but it's still an ugly game about crawling through brown and gray tunnels. It's one giant sewer level. All the hidden or not hidden lore doesn't change that the setting we actually see and experience is hideous and boring.
You remind me of my old friend who was obsessed with a dumb monster movie called Cloverfield. He insisted that I watch it, and afterwards I said, dude, this movie blows. NO! he said, there's actually tons of really deep lore to the movie, you just have to look for all the hidden messages in the marketting material and hidden pages on the movie's website, and you'll see that the soft drink company in japan that the main character worked for was actually lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ok, I said, that sounds really irrelevant and all, but none of it was in the movie. NO! he said, you're wrong, and he showed me the final scene from the movie, and told me to squint really hard, and indeed, deep in the horizon, you could see about two seconds of a meteor falling. Somehow in his mind something about this two seconds of meteor redeemed the entire crappy movie for him.