I think there is a spectrum of difficulty in both arenas. For instance, I found writing some javascript code to toggle css around my personal website was far ea

I think there is a spectrum of difficulty in both arenas. For instance, I found writing some javascript code to toggle css around my personal website was far easier (and required less math) than sizing the pipes in the house I am designing. That said, I have also worked on much more complicated software projects that demanded more effort on my part. I assume there exist more complicated plumbing challenges as well.