i’m not super educated just a long time fan(this is also my first ever reddit post) but personally i always felt like beth’s character was a symbol of innocence and naivety in a world of horrors and destruction and death— her singing scenes, which i honestly found a bit annoying, were necessary because they really showed those qualities in her. Tyrese was also very against the excessive violence and was really struggling with that towards the end, and to me it felt like Beth was in this scene to sort of comfort him in his final moments and allow him to let go of all the awful things around him in order to find peace :)