I would change the push from ethical software to ethical development.

Software, like so many drugs is not "unethical" on its own, but the user (or doctor compared to medicine) is the one that makes an unethical use of it (or medicine)

I agree that in our society where software is pervasive, an ethical framework needs to be in place. As an oath, it will not force everybody to comply, but the choice will be based on full knowledge that it is an unethical choice. And that amounts to intentionality

Can I advocate that software developers should be oath to write software that do not harm? The ideal would be that the law should protect software developers that refuse a particular assignment on ethical grounds.