I don't think technically perfect and artistic are mutually exclusive. Even after all these years shooting I still get what I call artistic images, yet they are technically fine. Maybe the real question is what is artistic?
In this context "technically perfect" is meant to correlate to the technical aspects of an image that *photographers* tend to obsess about... sharpness, noise, exposure, etc. etc... "the facts" of a scene/image. And I think the more artistic an image is, the more those things are compromised. Most photographs have some combination of both, and the technical aspects/qualities then have to be judged w/in the context of the purpose.
Some would say that when an image looses all of those (factual) qualities it ceases to be a photograph, and instead it becomes a piece of art created using the photographic medium, and the quality becomes entirely subjective (which most
photographers hate). But it is still also a photograph...
For example, consider a high key image that works very well for you, but it was created by extensive overexposure.
Or an image that was created using intentional blur/camera movement. I don't typically like these types of images but I've seen a few that were very good. I think it would be fair to say that it requires a great deal of skill/technique to create a successful image of this type intentionally, and it would be fair to say that the image is "technically fine." But the technical qualities have been driven into the realm of complete subjectiveness.
The original premise of this thread is, I think, a false dichotomy, i.e. you can be both a skilled technician and produce work that conveys strong emotions.
Then I think you have missed the original premise... it has nothing to do with the skill/knowledge (artistry) required to create the image.
IMO an artistic image conveys mood/feeling/message. And a technical image conveys facts. Both types of images can require an equal level of artistry (skill knowledge) to create. And you can create an image that has some balance of both. But as the intent/purpose moves farther towards conveying mood/feeling/message the more the facts of the scene/situation are compromised, it seems to me that it is almost a requirement (I can't really see an exception).
I think another genre that correlates well is woodworking. Take a woodworker who has a great deal of skill/knowledge... what might commonly be call "artistry." But is the result produced art? Some might say yes, but I think it actually depends on the intent and the inherent characteristics of the result. And almost by definition, the more the product is a piece of art, the less utilitarian (factual) it is.
Say they produce a simple side table with perfect joints, great proportions, excellent finish, etc.... is it a piece of art? I would say no, even though it required a lot of skill/knowledge (artistry) to produce.
Then they produce a piece of woodwork that is intended to be a wallhanging. It's made from extensive joinery/marquetry, also with perfect joints, great proportions, excellent finish, etc.... is it a piece of art? In this case I would be more inclined to say yes. But as a piece of cabinetry, and judged within that context, it is utter rubbish. As a piece of art, it's "quality" is entirely subjective.
And say they produce another side table; this time it has highly tapered/carved legs, it has fine inlays and the top is marquetry... this piece has some of both characteristics. But the artistic characteristics actually detract from the utilitarian (factual) characteristics... the legs are more fragile/less sturdy, the inlays reduce the integrity of the wood, and the top is very easily damaged. Now the quality of the piece has to be judged w/in the context that matters more to you.