No it’s not irrelevant; bias is good when it hinders horrible things and supports great things.
This is an argument on the merits of specific biases, not an argument that all biases are bad; no person or group operates with the intention of removing all bias, even if they claim to want that.
But as we all operate with bias, what appears to us to be good or bad is necessarily informed by it and makes subjective claims about which political biases are for the common good opinion only.
That's why we have democratic systems, so the mass of those opinions, informed by those personal biases override (in theory, if not always in practice) the opinions of a select few.
That is also why it is important to flush out as much as possible the undemocratic representation of ideological bias (left, right, whatever) in a tool as powerful as ChatGPT, when it has been clearly shown to be present.
This is an argument on the merits of specific biases, not an argument that all biases are bad; no person or group operates with the intention of removing all bias, even if they claim to want that.