That was the first link that came up on ddg, but it's laughable to presume that vox isn't just as biased, just in the other direction. Here's a couple more on the subject. I suspect you won't find a left leaning source with this opinion because it would undermine one of the primary ideals behind modern progressive thinking, that all groups of people would magically achieve equity and equal representation across all domains if only presented with the same opportunities.

https://www.commonwealthfoundation.org/

https://www.heritage.org/education/report/the-myth-racial-di...

Wow, thinkaboutnow is quite the website.