That’s true but it’s not what they actually mean when they say “diversity” so all of this should be left out of the essay.
Take University of Washington for example. They ask for a "diversity essay". They define diversity as "diverse in cultural backgrounds, experiences, values and viewpoints." [1]
[1] https://admit.washington.edu/apply/freshman/how-to-apply/wri...
I'd imagine it is about the same! Why? Because they don't really care about the essays.
Applications are not reviewed by "admissions people". They hire temporary workers (grad students, retirees etc) to review applications, and give them 8min per application. And that's for the whole application, and they have barely any time to read your essay. See story about UW, which I am referencing here [1].
The reason for making you write essays is just to obfuscate the reason you were denied admission.
[1] https://www.king5.com/article/news/local/a-look-inside-admis...