Basically, you might think about one thing as 'moral fashion' and another as 'social good', but you are really comparing two fashions and pretending to be objective.
To make a concrete example out of the situation in front of us: if there is proof that diverse companies perform better (https://hbr.org/2016/11/why-diverse-teams-are-smarter) then his reasoning about how diversity initiatives are wasteful must be incorrect.
So to say that he is 'correct' means to turn your back on empirical argument, and to base things in identity politics.