This "equality of opportunity vs equality of outcome" discussion is a mischaracterization of the position of "the progressive mob" that is misguided at best, dishonest at worst.
Historically, in feminist, anti-colonial, and anti-racist circles, an inequality of outcome, on the basis of race or sex is the best indicator one would have of an inequality of opportunity. This is why the "separate but equal" doctrine of Plessy V. Ferguson was manifestly unequal: it consistently resulted in unequal outcomes.
Those that hold that certain races or sexes are inferior conclude that these inequalities are due to the natural, inherent superiority of men/whites/westerners/etc rather than an inequality of opportunity. It doesn't take being in the so-called "progressive mob" to reject that line of reasoning.