Came here to say exactly that. Not only is it proportional, but if anything is a sliver above average. The argument that TC is trying to make is on par with the people who advocate for workplace diversity and go on to say about how 50% of the hires should be black - without recognising that the black population makes up only about 13.5% in US, at which point what you're doing is discriminating against everyone else just to fill arbitrary quotas not grounded in real world statistics.