I don't think there's anything wrong with pointing these issues out, even if you think AI is merely an accelerant of existing social issues. And it's not necessarily a question of how left you are to believe so. Ultimately what's important is the outcome, and if the outcome is an increase in marginalization, then I think something should be done. Stopping AI is probably suboptimal but the alternative that preserves the rights of the marginalized is getting everyone to agree that society should be more fair, and in that context can you really blame people for espousing a belief they find more actionable or practical?