have you tried cadquery or build123d?

nope, should I? Or should I try your thing?

To me "parametric" features seem like a nice to have vs a hard requirement. I just want to be able to talk at my computer and get back an STL to spec that I can print out

then our product is probs better, build123d and cadquery are more useful if you need the output format to be a STEP file or something in a BREP format. For 3d printing applications thats not really necessary because your are exporting to a mesh format to print it anyway

try our thing and use the "creative mode" then! let us know what you think