HEMA for self defence

HEMA for self defence

Yes, very much so. Professional security personnel often has to head towards the violence instead of creating distance from it like any sane citizen ought to do. 

The Historical European Martial Arts are millennia old, developed over time while being used in actual combat in a wide variety of situations.

As there are many different kinds of violence and volatile or even violent situations the martial art used needs to be flexible. After all, giving a crazy old lady a low kick just because she is throwing cans around in a supermarket isn't very professional. HEMA by its nature is very scalable and flexible, thus fits this base requirement perfectly.

The hard part is finding a teacher that can teach you all the other meta-skills that you need to apply a martial art in the real world violent situation, that however is a problem all martial arts share. 
Yes, absolutely.  If the strongest, the fastest or the most aggressive person would always come out on top in a fight we wouldn't have martial arts today. Physical attributes help greatly in violent situations at the untrained level, but as your physical and mental skills develop their influence drops down to become only marginally important.
Thankfully, in most parts of the world, people don't carry swords anymore. Like the gun the sword is a weapon purely created to kill. As such it feeds directly in to the universal human phobia for violence. The difference is that the sword is heavily romanticized because it isn't in common use anymore. 
None the less, the sword is an awesome training tool. It immediately brings the point across that violence is real, and is dangerous. Where people foolishly think that punches and kicks aren't really dangerous, the sword immediately does away with such foolhardy sentiment. You have to move and you have to do it right or else you may very well loose your bits.