I believe some of my posts would become better with images added, but they are lacking because adding them does not come naturally, I have to consciously urge myself each time I post an image. I don't have any issues with the idea of with sharing them publicly or copyright terms.
When writing an answer, I'm storing my flow of thoughts as a text. Adding an image disrupts my thought flow, because
- adding an image is different in each online system, requiring either some magic markup code or finding that button you need; this trains the mindset "it's not easy" even if it's relatively easy in each system by itself. In comparison, writing text is pretty straightforward once you've found a box that accepts it.
- uploading the image is a chore on its own -
- find the image in my photo library;
- is it good to submit as is, or should I resize/crop, sharpen? (usually, yes);
- find the image again with the file browsing tool you use for uploading the picture.
- now, what were we talking about?
One thing I see here that could be improved from SE side is accepting picture uploads by drag-and-drop; it would be slightly easier to use, but not a magic bullet for all the issues.