I think the lesson is what it is. There are plenty of folk who lose someone or something only to find a closer relationship with the Divine because of it. Grief brings tears. Tears and heartache turn one to god/God (or whomever one chooses as a transcendental authority outside of one's reality).
Melinda (as a character), is using her gift in service to others. Does that glorify what she does for mankind and accrue Grace? Of course it does. Is it evident for all to see in all cases, well no, it isn't, but it's not something we should dwell upon. What you see before you is a scriptwriter's vision who recognized that good works bring an easement to tears... whether she becomes aware of it or not in the next episode remains to be seen. Just a paste that's help me cope with my own losses... "Grief is a great friend, for it opens one's eyes and
shocks them to search the secret of peace and happiness." - Baba