Coco,
You have to understand that this ad and the one for the TFO's were written by a police HR department and, to them, are "just another job advert". As long as they get the required pink/fluffy/equality/diversity bits right then all is well. Probably why neither of them included height, sitting height and weight limits.
It's a learning process and, eventually, they may get it right. Just think of it as an opportunity to educate someone.