You misunderstand what Diversity, Equity, and Inclusion is. It's not about favoring anyone despite qualifications and never has been. Using it as a pejorative in the way you are is how the right wants to use it, but it is also racist, sexist, and ablist. It doesn't reflect the purpose of the concept at all. In fact your description of "favoring one candidate over another specifically due to immutable personal characteristics, not their qualifications for the job" is exactly what the concept hopes to prevent, not enable.
DEI is not "reverse racism" as so many want to put it, it is more about considering diversity and recognizing personal and institutional bias, and working to ensure that bias does not negatively affect people, whether that be in hiring, consideration for roles or promotions, and so on.
All the things we've seen both in government and in companies suddenly dumping DEI programs is craven, and if you actually look you can see it's already doing damage. There seem to be a lot of assumptions that women or people of color in high positions are "DEI hires" when they likely had to work harder than white men to get where they are. I mean firing a 4-star admiral because she's a woman and then claiming she was a DEI hire is insane, but that's where we are. Automatically assuming a black or trans pilot is a DEI hire is insane, but that's where we are.