Fascinating. It is quite rare, though not unheard of, where I am from, to be unable to access one's internal reserves entirely, though skillful manipulations of the more ambient aetheric energies of the world does usually require some level of study.

[ Stephanivien ponders a moment to consider the question, in light of the information that has been provided. ]

In the more traditional sense, no, I am not, but only by matter of practice, and not capability. My focus—and personal use—of the arcane has been in their intermeshing with technologies only, as opposed to more direct manipulation to cast spells and the like. However, I would be capable of doing so with appropriate study.