Women are perfectly capable of working in firefighting, the military or police. I've personally seen a female police officer of barely 1.60m throw a drunk 2m Russian dude on a rampage in a bar fight onto the ground and tie him up alone, about a solid third of the volunteer force in my THW unit are women, a good friend of mine is a trained volunteer firefighter at about the same height as the police officer, and the IDF has women in active fighting roles since the 70s, and fully equal to males since 2000 - and look where the IDF is, they are without question the top dog in the MENA region, despite all the cries about women threatening the fighting capability.
"DEI" means opening up the gates for everyone on actual merit. For women, it can sometimes mean having to rely more on skill than on brute strength (as in my first example), but in the end it doesn't matter much.