I think Elden Ring (and the souls genre in general) IS designed with the assumption players have access to the internet to search for stuff if they want.
The game will still provide quite a challenge even if you know where you need to go and get weapons/items/etc. The bosses won't defeat themselves even if you know the overall strategy to use.
I think of it as kind of a self-regulated difficulty system, if you want to go in blind you are still free to do so.