I asked a similar question myself on my thread because my GP thinks I should take ADs due to being sad and down but like you OP there is a clear cause for me feeling this way.
My view is that there is absolutely no right answer or no one-size-fits-all answer.
I agree with the poster who said she was not sure ADs were a good treatment for depression but they were a good treatment for the symptoms. Wonderful for giving you a boost to get yourself sorted, and also great for those with chemical / physiological reasons for their depression but for those who are depressed due to life circumstances I think ADs can be a mistake.
First of all because the grieving, sadness, misery might be a natural response to circumstances and it might be a necessary thing to "feel" that and two because it might be running away from facing things.
My ex partner got depression, and while he only went to a few counselling sessions a year on he is still on ADs. If he tries to come off them, wihin a week he is crying on my doorstep and suicidal again. He goes back on the pills and he is laughing and joking.
I don't believe in his situation this is because he chemically needs those pills, but more than they turn him into an emotional zombie and enable him to avoid facing things. The longer he goes on like that, the harder it will be for him to heal.
I think all cases are diferrent. In some cases of depression what people really need to do is go into long term therapy and explore why they are depressed and change things.