The idea that we should walk this back because the colors might have been subtler feels like missing the point. The educational value isn't in perfect historical accuracy down to the pigment saturation curve, it's in breaking the spell of the solid-white classical canon. The garish reconstructions do that effectively; tasteful, muted ones just slide back into the same old norms. If we end up concluding "actually, ancient art was basically compatible with modern elite taste" that's not just boring, it's actively harmful to diversity of ideas about beauty.
So yes, even if the evidence points the other way, I'd argue we should lean into the loud, uncomfortable versions. Sometimes a less "accurate" narrative is the more important corrective, especially when the alternative reinforces centuries of aesthetic dogma we should really be questioning.