Skimmed all previous comments, and it appears that no one mentioned that Obama did not choose his seat, it was assigned seating in chronological order of presidency.
Clinton, and Hil, GWBush and Lara, Obama (Michelle opted out as she would have been next to Trump), then Trump and Melania.
VPs and their spouses (TIL that Gore and Tipper are separated but both were present) were seated around their Potus, also chronological.
Cheney was absent, but perhaps retired from public life.
I think this is a poor implementation of what I read of the actual OPM order of anti-DEI stuff. Some military departments are in full CYA mode, cutting things wholesale and also getting rid of ombudsmen, which is an important part of comms when units are deployed or at training.
The Tuskegee Airmen, women cryptologists of WWII (such as Elizabeth Friedman and her crew), or WWII Windtalkers group should in no way be seen as DEI when they had outsized contributions to their LOEs.