F: For gearset do we need to prepare same items for diffferent gear slots?
Y: Right now you will have to get 2 for example you have 2 gear sets to be realistic. We’re trying to make it possible but for UI it’s going to be confusing so right now we’re talking about where you can use the macro to move those items between gear sets so it’s going to bit technical. We want to ask the players and get feedback for this one.
F: So for now right now if you want same items in 2 gear sets you need to get 2 of the same item?
Y: Yes at this time that’s it but we want to get players feedback for this one.
I just re-watched that part of the video and agree with Reinheart's translation on this.

But I think people are getting a bit hung up on the English word "realistic" which I don't think is the actual reason for their current design of the gear set system.

What Yoshi P said is that the reality of the way they set up the current gear set system is where the actual item is placed into the gear set. [my analogy: The gear set is like a bucket and you have to place the actual item into the bucket.] That is the way the system was built to make it "easy to understand".

To allow the same item to be placed into 2 different gear sets they would need to set up an "alias" to the item rather than placing the actual item into the bucket.

[From a non-programmer point of view, I don't understand what the problem is... exactly, but to me it sounds more like a programming/UI design challenge that they should work out.
From a player point of view, having an "alias" so you can assign the same piece of gear to different sets makes perfect sense and seems like the best way to do it.]

Anyway, in its current form, you cannot use the same piece of equipment in 2 different gear sets.

Currently the 3 options he outlined are:
1. Require multiple objects if you want to place them in different gear sets.
2. Manually set other pieces of gear after changing to a gear set.
3. Create a macro to do set the other gear after changing to a gear set.

And they would like feedback on this.