StackExchange Friday: Why do immortals not use any neck armour in Highlander (1986)?

Excerpts from: Why do immortals not use any neck armour in Highlander (1986)?

First, the question:

"An immortal in Highlander can die only if decapitated. That is their only vulnerable point in a sword fight. (I stick to the canon of the original Highlander, as in Highlander V we see immortals resurrecting after they die.)
I think it is extremely unwise not to protect the neck with any kind of armour - especially when being able to prepare for a fight. The importance of protecting the neck has been recognised by mortals - they used gortets, aventails, bevors, etc.
Why is the use of such protection uncommon among immortals?
In case of any inconsistencies I consider only the original (1986) movie canon."

Some comments:

"Just guessing, but maybe they realize that if they make themselves basically unkillable then none of them will ever collect 'the prize'".

"In Addition: Armor in real life does not work like in a video-game. Wearing only some kind of neck collar would give you hardly any protection against the swords they are fighting with. The blow of a long-sword is strong enough to break your neck and crush your trachea. So a functional protection would have to be mounted to a upper-torso part to provide any real protection. And flexible torso and shoulders are very important for good swordsmanship - and armor hinders that."

Accepted answer:

There is no accepted answer, but one comment and one suggested answer had an important point in common: 

"In the movies but also in the series, if an immortal is say stubbed in the chest during the fight, they will be rendered unconscious. Then, their opponent can easily remove the neck armor and decapitate them. So really, there's no advantage of wearing the armor in the first place, as it might hinder them during the fight."

"Notably, they don't wear any armor at all. Getting any serious wound that immobilizes you would be just as fatal as a blow to the neck, because if you are wounded or helpless, you will get your head chopped off no matter.
It would seem that the immortals have a full focus on speed and mobility, with as little to distract as possible, since they only expect to be fighting duels. Connor's ugly sneakers in the first fighting scene confirms this: he picked functional shoes over something that would actually match his trench coat.
And in case they expect a full-scaled battle against mortals, they do wear armor, as we can see in the first movie: The Kurgan is wearing some manner of plate armor, although with no particular protection for the neck."