<rant on>
This is why I hate using the German & Italian terms:
When watching all these vids I find I can do many of them BUT I find the over focus on unarmoured vs unarmoured Longsword dueling to be a distasteful effect in HEMA/WMA. It is forming a closed loop in which we abandon perfectly fine language from English to use terms that, by their use, exclude those swordsmen/women who have studied other systems or never learned the German or Italian thus leading to an even worse exclusivity focus and helping to kill growth & Egalitarianism.
<rant off>
I'm going to be operating on the premise that the over-focus on unarmored dueling and the language thing are two separate points, otherwise I'll be honest, I have no idea what you meant.
Over focus on unarmored vs unarmored dueling? The overwhelming majority of historical treatises are also focused in this way (also armored vs armored). This is the re-creation of an historical martial art, and it's goal is to stick to the source material and be faithful to the history. I'm not sure what you're suggesting it should focus on. As far as the language, I'm in 100% agreement with Jess on this. When I used to take Wah Lum Kung Fu many many moons ago, I learned the Chinese terminology. When I was a student of Japanese martial arts, likewise, I learned the Japanese terminology. This did not make the art exclusive or un-welcoming, it was just the appropriate way to learn from the source, as it would be for Western Martial Arts...
If by the over focus on unarmored vs unarmored longsword dueling, you're suggesting using mixed weapons and various styles of armor, well then we have that, it's SCA heavy, and it's not historical in its basis. It doesn't use historical techniques, weapons, or armor and allows any combination of things. In WMA/HEMA, the goal is to be faithful to the historical source material, and this often includes unarmored vs unarmored longsword because of the Judicial Duel etc..
WMA is also not limited to that scenario. Poleaxe, messer, wrestling, dagger, sword & buckler are just a few of the aspects I can name off the top of my head that are included. But once again, the goal here is to recreate, with faith and respect, the actual practices of those people of Medieval and Renaissance Europe. True to the source material, not altered for sport, fun, or the inclusion of personas of different time periods.