People often come up to me when I'm drawing in Coffeehouses and ask questions about the process of drawing, or about Art. 98% of the time they already have some preconception they picked up somewhere that is so out of left field that I'm paralyzed and don't know where to begin sorting their misunderstanding out. It could well be that you, Borg, might ask me just such a question. Or you might say, "I wish I could draw, but I can't even draw a straight line!" To which I always want to say "If you need a straight line, use a ruler. Where the hell did you get the idea an artist needs to be able to draw a straight line freehand?"
It could be you, personally, wouldn't say something so naive about art, but the point is there is certainly some field in which you are completely ignorant of the actual process and goals, and don't realize it because your preconceptions about it have never been confronted.
You may think people would be a lot more open minded about being corrected about what artists are up to than they would be about being corrected on Science because Art has the reputation of being an extremely fluid, non-regimented endeavor, but they aren't. If you already think an artist needs to be able to draw a straight line freehand, that the meme is so prevalent and often repeated it must be right, it turns out you'll be made very uncomfortable to have that idea challenged, as I've frequently discovered. There's a whole slew of false ideas about rendering out there that I didn't even know existed until I started drawing in coffeehouses and talking to people.
Technical vs non-technical is really just a special case of the greater problem of having to contradict anyone's ideas about anything. People react to how irritated you seem to be by a given question, and to how much what you say contradicts what they already thought. Generally stubborn people will be no less stubborn in this than they usually are.