The Court continued, “For their part, the DNC and Wasserman Schultz have characterized the DNC charter’s promise of ‘impartiality and evenhandedness’ as a mere political promise—political rhetoric that is not enforceable in federal courts. The Court does not accept this trivialization of the DNC’s governing principles. While it may be true in the abstract that the DNC has the right to have its delegates ‘go into back rooms like they used to and smoke cigars and pick the candidate that way,’ the DNC, through its charter, has committed itself to a higher principle.”
I’m not saying the DNC isn’t biased. But it looks like that was a legal arguments made by lawyers. Generally, they make every argument they can fit into their brief.