Well, that's a good point, but it turns out that a good draftsperson can use practically any drawing program to make a decent schematic.
For myself, I've settled on drawing schematics with Corel Draw. I've built an "electronics parts box", with pre-made symbols that I can copy and paste into a drawing. Of course, it lacks all the nice features of an actual schematic-drawing program, like being able to snap parts into a grid and easily connect them; I've got to line everything up by hand. But I think if you look through my schematics here on this site, you'll agree that it can make some very readable schematics.
This is certainly several steps up, by the way, from using a primitive paint program like Microsoft Paint, which should really not be considered for any serious usage at all. For paint, I use Paint Shop Pro, which at least starts to approach the kind of functionality of Photoshop. My current workflow is to produce the schematic drawing in Corel Draw, export it to a 256-color GIF, then use Paint Shop Pro to reduce it to 16 colors (reduces file size significantly).
You can even capture schematics from LTspice this way. Export the schematic to a WMF file; drop the WMF into Corel Draw; export to GIF; import to Paint Shop Pro. (In this case I deal with the drawing as a 16-color GIF, to preserve the LTspice color scheme.)