That form sensitivity is pure training based on focused processing and gradually opening your awareness.
For some that works faster and more intensely than for others and then intrinsic motivation plays a large part.
Engineers and designers often come from completely different backgrounds. The best designers have done so much explorations with sketching and foam/clay that they develop a tactile intuitive sense for good form that they can after some years do this all mentally and concurrently work in CAD. If someone is ‘skipping’ this form exploration and starts building in CAD anyway, it is advisable to have them work together with a designer so the designer chiefly defines the form, while the CAD engineer fine tunes and translates it to production files. The mutual exposure opens a sensitivity over time, it does not come quickly.