Timnit Gebru is not a sincere researcher, in any respect.
She has proven to be willing to act in bad faith on numerous occassions when she is losing an argument. Not to say that a researcher is forbidden to hold any political opinions whatsoever - but her research is primarily political activism, and when political activism goes into research, what you get out is political activism, not research.
The whole Algorithmic Justice League concept is the process of overstating the impact of difficult-to-handle problems in order to secure laudable research positions and book deals.
Which - there actually should be someone willing to pose those arguments, but treating them as sincere researchers and not motivated