Fundamentally, I think trying to shortcut and use terms to consolidate and represent a complex idea is broken.
If you have never encountered the concept or had it explained, then it's some black box. What does "I support DEI policies" mean at face value. How do you parse that sentence if you've never heard the acronym?
"It means diversity, equity, and inclusion" doesn't clarify anything. Diversity of what, specifically? Who is being included in what? How do we measure equity?
Especially for people who have been conditioned to think that you don't qualify for diversity if you're white.
The lesson isn't that we need new terms to rotate through to stay ahead of media. The lesson is we need to speak to the actual fucking meat of the matter.