Blind hiring is a good idea. But definitely cannot explain the bulk of the issue. It is systemic and the article completely writes of the idea that there is a pipeline problem - which ignores a lot of the pre-college factors that go into whether or not a student of a minority demographic can succeed in a top tier engineering program in particular (I mention engineering because the article refers to Silicon Valley jobs a lot).
Below are two pieces on the demographics of engineers at Harvard and Stanford: they show pretty clearly that the percent of Black and Hispanic students in these programs lags significantly to the US population percentage.
https://medium.com/@jcueto/race-and-gender-among-computer-sc...
https://medium.com/@winniewu/race-and-gender-among-computer-...