Actually in terms of meaning of the wording "Self defense" it does not matter. The wording simply states defending yourself and can be done on many levels.
Situations may be different but noone can argue that a cop never has to defend himself. As if he was never to be threatened?
Same thing applies to a hospital worker, just different situation, different scenario and different solutions. All use self defense, all use it differently.
Even two people with same job, same country of origin, same language, same everything. Being attacked by same guy, will utilize different solutions in terms of self defense. It is all individual if you simply add enough details to look at. No scenario is identical to another.