In Kant, practical means ethical. This initially seemed counter-intuitive to me. Like many, I used to think of the “practical” in technical and utilitarian terms, as how we realize desired results. I also used to think considerations of value needed to be guided by considerations of truth, and that pursuing the truth far enough and sincerely enough would spontaneously provide sufficient answers to ethical questions. I would no longer put it that way. I now think that the pursuit of truth, taken far enough, shows things to be “normative all the way down”, in Brandom’s phrase. Even the most narrowly technical considerations ultimately involve questions of value. Conversely, inquiry into values is the one kind of inquiry that need not presuppose any other.
Ethics are not a spontaneous byproduct of inquiry into the truth. In order to sincerely inquire into the truth, we need to deliberately focus on all the questions of value that come up along the way and affect our judgments. As a result, I now think of ethical practice as subsuming every other kind of practice.
Ethical inquiry is concerned with what we should do, which includes the details of how we do it. Every kind of doing is subject to this kind of consideration.
Engineering, to take one non-obvious example, is not just about coming up with designs that “work”, but about coming up with good designs. Various kinds of arguments that are relatively “value free” can be made about criteria for good design in specific contexts, but ultimately what matters most is that the design be “good” or better than the alternatives, however that is to be understood in the particular case.
An ethics-first view of philosophy puts ethics or “axiology” (inquiry into values) before epistemology, ontology, or formal logic in the order of explanation.
All doing has ethical implications of one sort or another, and all inquiry (also a kind of doing) ultimately involves questions of value.