IMHO. While prompting is something one can get better at, you're still just rolling the dice and waiting to see whether the output is delightful or dismaying.

You yourself acknowledge someone can better than another on getting good results from Stable Diffusion, how is that in any way similar to slot machine or rolling the dice? The point of those analogies is precisely that it doesn't matter what skill/knowledge you have, you'll get a random outcome. The same is very much not true for Stable Diffusion usage, something you seem to know yourself too.