The salary is very decent for what is essentially (at the point of signing up) an unskilled job. Plus the shifts they work mean that they nearly all have other work too...
A couple do fit the Athena poster stereotype, although both are serious letches undeserving of a classy lady like Lush. The others are all married and / or ginger.
They are really NOT (all) particularly fit, and the way they operate now, is to sensibly rule out as many risks as they possibly can.
I'd still not like it though. I wouldn't be able to deal with some of the things they see.
Is that how it works? Weird - I've got seven mates who are firefighters, and all are white, able-bodied and straight. They must have all just been really lucky I guess?