"Marginalized" is one of those words that have been coopted to mean whatever these idiots say it means regardless of its actual meaning, or who it actually applies to in actuality. In our current climate the only truly "marginalized" people, by the actual meaning of the word, are the ones who either hold the "wrong ' political positions or disagree with the prevailing narrative—who are hunted to the ends of the earth, publicly shunned and attacked with impunity, and driven to financial ruin (or at least attempted to). You know, MARGINALIZED.
But no matter how many lonesome instances of fringe individuals without political power or influence who are genuinely bigoted or racist (against non-whites) you may find, people in the modern western world are demonstrably NOT "marginalized" on the basis of immutable characteristics (with the arguable exception of men and white people). The only basis of marginalization in the current paradigm is political. The idea of inherently "marginalized" people on the basis their race, (female) sex or (non-heterosexual) sexuality is newspeak.
I particularly love the assertion that people who complained about the new Spelljammer stuff "correctly" identified problematic content when the fact of the matter is that this is all subjective and subject to whatever whims people have that day. There is no objective criteria to "correctly" identify in any of this. It's all a matter of what direction the winds blow that day and how they are able to spin the current outrage. No amount of "cultural" consultants is gonna be able to predict or fix that. But I'm glad that WotC is willing to waste money to appease the mob. Anything that drives them closer to ruin is fine by me.