DEI might have contributed to this, but we wouldn't be hiring unqualified people in the first place if America could naturally compete for talent. The lesson learned seems to be less about the dangers of diversity and more about how the feds aren't paying the industry rate for professionals.
Per that article, candidates who accepted the pay terms and wanted to become ATCs were /rejected/ explicitly because they were not minorities or otherwise able to produce a biographical or demographic reason for acceptance, even when they scored a perfect score on the standardized aptitude assessment.
If you have something to refute the article the person above me linked, I'd love to see it because I'm incredibly disappointed in what I read about in that article.
I thought Trump instantly blaming DEI was ridiculous in this case but I’m somewhat reconsidering.
How much less of a shortage of ATCs would we have now if it wasn’t for that debacle?
Probably not much, considering the biggest constraining factor is pay. For example, San Carlos airport is shutting down ATC entirely because they can't pay anyone enough to live locally to the tower: https://www.kron4.com/news/bay-area/bay-area-airport-losing-...
There would be no problem filling the seats if the compensation was handsome and attractive. But we all know how federal workers are compensated, even when lives are on the line.
I could see this maybe being an issue in the bay area but outside of that area that pretty good pay.