I think that is only true as far as the standards go. And they may not actually change the standards per se.
If someone makes a mistake (and all humans make mistakes, it is what we do) then, depending on the severity, you might get a warning, or you might lose your job.
Some mistakes are so egregious there isn't much wiggle room and it is a fireable offense.
Others, you may get a warning, a black mark on your record. More than one might get you tossed out.
It has been my experience that, even if the standards on paper are not lowered to accommodate "diversity" in order to foster greater "inclusion and acceptance" of various "protected classes", the leeway given becomes much wider.
There was a famous book some time back, widely read in the Naval Aviation community called "Bogeys and Bandits: The Making of A Fighter Pilot" in which the first class of female F-18 pilot trainees were discussed as part of the book.
Not only were standards lowered in the way I just mentioned (a male pilot would have been tossed out of the program with a single infraction, but at least one of the female trainees was given multiple chances to make that same crucial mistake) but at least one female pilot regularly used her protected status as a female to threaten instructors who didn't want to give her a passing grade.
To be fair, there were also women in that fighter pilot training program who were trying to meet the standards and be fairly judged, which is the problem with crap like "Affirmative Action" because even the competent people who are beneficiaries will always be under the cloud of that affirmative action, and will always have difficulty being judged on their own merits.
Bingo - in a few years all female and POC pilots will suffer from sideways glances from bug-eyed boarding passengers - all suspecting that the pilots are Affirmative Action grads.
And it may not be fair to those who actually made the grade without special treatment.