But Souls hints at it or at least gives signs that there is something more. Like Ceaseless Discharge, where people thought it was odd that he looked sad and didn't fight you till you took the clothing. That was the game itself pushing people to be interested in the deeper bits of it's story.
It's also more likely players will read into Souls lore considering it's intertwined with necessary descriptions. The key to Havel or the Depths is a good example, where when you look to see what they are used for you are pretty likely to read the lore bit as well.
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Same with Destiny, really. Considering it flashes the "Grimoire Unlocked" each time.