DEI means you end up employing some people who potentially aren't as technically qualified, but bring a different viewpoint to the team. Until I spent a long time living with Blacks (as a white) I never knew all the things they go through growing up, I never knew how their communities and families were organized, I never knew what sort of products they needed and what sort of products they bought. I never even watched BET in my life, or read Essence magazine, for instance. My life experience was a bubble that was cut off from a significant portion of the population.
Now add in Hispanics, Asians and every other culture and I am missing out on knowing how most of the world lives.