I'd consider addicts those who feel compelled to play it (or any other game) all the time to the point that it begins to interfere with their real life and ability to function as, say, a doomed-to-fail means of escape from the inescapable. I'd also consider those who do become addicted have a predisposition toward addiction in the first place that needs to be addressed, i.e. it's not necessarily the game's fault. The industry at large does prey on psychological/neurological or subconscious vulnerabilities, but so do all the rest. Perception management and "public relations" of the manipulative Edward Bernays variety is all the rage today and RNG itself is a "gambling" mechanic. So, it's definitely something to guard against the very same as propaganda, but this is different, imo.
What you're describing, which is a strong focus on efficiency, I'd consider more "left-brained" (and the grabbing, grasping mode of attention of the left brain hemisphere) than "right-brained" as a matter of degree, with sincere apologies to Iain McGilchrist because it's such a crude example. Obviously, it's not that simple. I'd hazard to guess (though could be wrong) most of us, subconsciously or otherwise, actively seek out the most efficient way to play video games, especially games specifically built for efficiency with stacks upon stacks of buffs and debuffs, etc. for reasons I'll spare ya, but don't think it indicative of addiction so much as a predilection toward the mechanical actually reinforced by the civilization we live in. In fact, some studios have lost me completely due to their reduction of art to pure mechanics because I'm in it for the aesthetics and they're not delivering anything worth contemplating, but merely endless checklists of "stuff to do". (
The Arts Can't Be Reduced to an Equation.) That's why I can't stand "radiant" quests and the like. They're anything but radiant. That's also why I think a hybrid LBD/LBR system for the game is a pretty bright idea. We're not all the same and we don't all play the same.