> You may take pride in your craft, but the majority of people physically cannot notice the difference between good and bad design. Not even subconsciously.
Particularly the "not even subconsciously" part thrown in at the end. Because, if this were true, then YouTube creators would not pour an insane amount of effort into the THUMBNAILS of their videos. Marketing talent would not study human psychology and do A/B tests to figure out why certain ads sell products and others don't.
There is so much theory and study behind design, attraction, pattern recognition, contrast and standing out from the crowd that even though the average person doesn't necessarily notice how these strings are being tugged on, it doesn't mean that they aren't having an influence .
And I don't even mean to this to say "we're all sheep being brainwashed by corporations." That's actually far from my point. My point is that attention to quality affects the user experience regardless of whether the user can recognize or articulate WHY.
In a photograph, and think about YouTube thumbnails as a good working example, the "mise en scene" is critical for supporting the clarity of the message. There's a reason that the majority of thumbnails contain pictures of peoples' faces: the human brain is distracted by faces... so if you're trying to pull attention to your thumbnail, it's a good method. Why are these faces usually obnoxious? Because the facial expression also communicates the tone of the content and how the viewer is intended to feel about it. The ALL CAPS sections in titles and captions, while annoying, also has a purpose: to highlight key words that describe the promise of the video.
All of this speaks to the quality of design. And users might not know why they prefer certain designs over others. Why certain websites sell products and others don't. Why certain videos and articles get clicked on while others don't. That doesn't mean that, therefore, "most people don't care about quality." It means that, like you said, most people don't have the relevant domain expertise necessary to be able to judge why the quality of one design "feels" better than the quality of another.