I have played with a couple of CAD packages (free ones like FreeCAD anyway). There is quite a learning curve to those as well.
I had hoped that learning Blender would pay dividends in other types of pursuits as well since it is a fairly broad tool. And as you probably now, there are "mathematical" ways to use Blender — parametrization though is a bit lacking (without going down the plug-in rabbit-hole).
