I do. Then I use adapters to go back to SE. That allows me to use my headphones with the widest possible array of equipment. If you don't like balanced only, don't buy this.
You can certainly voice your opinion, but you're projecting your own priorities and making a general statement about what (you perceive that) other people want, which isn't particularly helpful. I don't have any issue with balanced only; in fact, that's more appealing to me than the Archel 2.5's SE-out only. Personally, I found that to be an odd design decision given balanced ins.
I am fully entitled to make that statement, it's you, who are projecting your situation to general population here. As I firmly believe there is a large group of people who do not have every pair with balanced cable.
This is why I am making a general assessment of the product considering very high % if not most of people do not have balanced cable for every set of headphone, making it unsuitable as the only headphone amp.