Well, correcting the biochemistry will change a LOT. it doesn't directly address the mental and emotional, but those can shift when you are properly nourished. Homeopathy works to shift all of them in a more direct fashion. At least that's how I see it. Changing biochemistry allows other things to start to regulate. Homeopathy creates the impetus for all of it to shift together.
But actually for my husband, I think he needs that kick-start from something energetic, which is why I posted on the Homeopathy support thread. We're doing the biochem-type support stuff that I think he needs (though I am re-evaluating some and tweaking a bit now), and progress is small, and I think mostly related to changing our attitudes. So I can see it working better one way or another for some people, or maybe it's just a matter of finding the right HCP that you click with, somewhat separate from what they actually practice.