Let me restate my thesis because I sense I wasn't clear given your response.
I believe that programmers rejection of visual programming tools has lead to a situation where programmers haven't been able to easily integrate Excel into programmer's workflow in a meaningful way or evolve tools as easy to use as Excel that translate directly to code.
For one Excel can be learned just after looking at it, and most people have someone who can teach them the basics.
Plus you just click one button and turn it on and then its a matter of making sure your logic pans out and the numbers get calculated correctly.