I'd say exact dimensions are the norm for FreeCAD too - the mouse isn't used for freely drawing shapes in any workbench that I'm familiar with. With the Sketcher workbench in particular, the constraints control the geometry; the mouse is essentially used for selection and input of relationships between shapes.

For example (I've only skimmed this video, there are likely better ones), check out https://www.youtube.com/watch?v=rgstQi9jpGc

Same here. I've dabbled in various CAD software packages but I always come back to OpenSCAD because it lets me build a well structured text file with every detail of my model, with no possibility of hidden variables. I'm willing to give up a whole lot of features just to have that precious text file.