Does anyone else find it odd how unimportant the great runes are in the overall story?

Like, the game only requires 2 in total to beat the game, which you can get from the first and second main bosses. When I first started out, I used to think you could unlock a special ending by getting every single great rune, but nope, you only need 2. I just feel they could have had a bit more plot significance, seeing as the game is literally called Elden Ring, surely collecting all the pieces of said ring would be a central focus, no? It just feels weird how 75% of the main plot devices are completely optional and unrequired.

Like, the game only requires 2 in total to beat the game, which you can get from the first and second main bosses. When I first started out, I used to think you could unlock a special ending by getting every single great rune, but nope, you only need 2. I just feel they could have had a bit more plot significance, seeing as the game is literally called Elden Ring, surely collecting all the pieces of said ring would be a central focus, no? It just feels weird how 75% of the main plot devices are completely optional and unrequired.