The cause of depression must be rooted out. Blending it in together with other stimuli is just diluting the poison, and that poison will corrupt other facets of your life. Drowning out the source of your depression is effectively the same as running away from and burying it, which can lead to self-destructive impulses that permeate the positive signals. Those impulses will leave people confused as to why they're in emotional turmoil even when engaging in things that should feel good.
Sorry if I've rained on your parade. It is good to feel good, but it is best to feel whole. That's what I want for people who suffer from depression.
1. the root cause(s) of depression
2. the dynamic balancing of the brain
point 2 meaning that depression breeds depression, and the trick I was mentionning above was to allow some space to reverse that pattern to an extent. Blurring the signals will allow your self to not feel dying in pain for a while, which let's hope, and motivation grow back a bit
for point 1, it may be that my comment rubbed you the wrong way, because I actually 100% think like you. I've suffered from too many places / people trying to ignore the root cause, which led to a longer disease and more problems (to this day). The thing is, you don't necessarily have the resources at first to deal with root causes. so point 2 can be a good, non chemical, help.
I get what you're saying.