It would be upsetting because it's more than likely not their choice but people assume it is.
Depression is like a broken bone it's a physical problem with a person's body beyond their control they need help to fix it.
People who have open-heart surgery have a 40% chance of developing depression it's not that all their life they were dealing with depression this is a sudden change. That's terrifying to see depression develop so quickly like a virus suddenly changing a person almost overnight.
If a person impulsively and mortally harms themselves because they couldn't control their actions due to chemical imbalance in their brain (depression) that would certainly be upsetting.
Knowing a person's actions were out of their control and they could have been helped or healed that's quite sad. We need to help people not accept it or mock it since it is just as much a medical problem as a broken bone, and it can be treated.