I am not sure why the wording around this has to be so abstract.
As you say, it's a reflection of our beliefs about what to prioritize. If you're interested in developing methods of image upscaling that generalize better and preserve facial properties that were underrepresented in the training data, that's an interesting area of research, and you're welcome to work on it, but you don't get to demand that people working on something else prioritize this instead, they get to choose their own priorities unless you're paying them for a particular direction of research (e.g. like Google should be able to direct Dr. Gebru while she was working for them).
There's a responsibility to correct for bias when implementing models in production (e.g. if you'd be actually deploying it in Senegal, then there would be a responsibility to use a Senegal-appropriate dataset), there's a responsibility to acknowledge the bias of a particular algorithm if one exists - for example if it highly relies on contrast values which would be different for different types of faces, then that's relevant, because it's a statement about the generalization of the algorithm; but there's no proactive duty to "address the bias meaningfully", that's nice thing to do, but it's like charity - a voluntary choice to factilitate a social goal, but not a requirement or responsibility to do that. There's a responsibility to correct harms you caused, there is no responsibility to correct harms caused by others, that's a good thing to do, but not a moral duty.
Someone who invests a lot into charity work or addressing bias is doing a good thing, but it doesn't mean that people who are doing other things are abdicating their responsibility - it's never was their responsibility in the first place to fix social issues in the wider society. You can't simply point at random people and declare that they're going to be responsible for something that they didn't personally cause and where they did nothing wrong, that accusatory behavior is unacceptable, so naturally there's a backlash to people who try to assert personal responsibility of others without a basis to do so.
While it would be a symmetric situation a vacuum, we do not live in a vacuum. And acknowledging dataset bias by itself doesn't address the bias meaningfully. In practice, we often treat the bias as an exogenous factor when it is not, moving it outside the scope of our responsibility. But it is very much the product of our work, a reflection of our choices, values, and beliefs about what to prioritize. We can't abdicate our responsibility for it; the stakes are too high.