The reason corporations have embraced DEI is simple. A tried and true technique for controlling a group of people is divide and conquer. When executives cynically realized they could use DEI as another tool in a divide and conquer strategy of control they embraced it enthusiastically.
They are PURPOSELY creating divisions and being over the top with it. As long as you are fighting each other, you aren't fighting them.
Unfortunately, there are a lot of stupid sheep out there that actually take things said by our leaders at actual face value. Wake the F up.