The idea of a 'graph in itself' is nonsense. Graphs are viewed by people and the functional relationship of a graph and its viewers is conditioned on choices the graph's author makes.

Assigning neutrality or bias without viewer of interaction is a category error. It is not an intrinsic property of the graph despite our wanting to simplify the world this way. It's like saying chocolate is intrinsically the best candy when what's being said is 'my relationship to chocolate is that it's my favorite.'