Why would you not support your friends through depression?
Supporting a depressed person will inevitably take a huge toll on your own mental health. That's aside from the time and physical effort it would take up. I am assuming that the friend has some understanding of depression to begin with, which from my personal experience is rarely the case.
I have supported a couple of friends through depression, and it is exhausting. In most cases I was only around them for weeks, and it drained happiness from my life. At time I felt like cutting contact, because depressed people are insufferable. The only reason I stayed to help was because I had personally gone through a similar situation recently, and didn't want to wish it on my worst enemy, let alone a friend.
It's like having a special needs child or being the carer for dependent parent. It is easy to say that you'd gladly do it, but the sad reality is you'll find yourself wishing for a better situation (with all the guilt in the world) once you are knee deep in it.
Also, supporting a depressed person needs lots of time and effort, and while they are depressed they give nothing back except bad vibes.
edit: I just found this meme: https://i.imgur.com/WCzNW77.png and I decided to link it here. People think friendship is something that is built over years because it takes years in order to have finally made it through enough hardship and shared struggle so calling each other friends is justified. This is the literal meaning of having a friend. You know they'll help you even you got nothing to give and without expecting anything in return from them.
I cannot decide if that is more abusive or more romanticized.
If you expect your friends to be there for you without you returning anything, you are abusing them. That isn't friendship, that is exploitation.
And if your friend is there for you even though you are incapable of returning anything, it is incredibly romantic. But also usually very limited, because that drain on your friend has consequences and needs to either be equalized by something (not you) or suck your friend dry until he himself is incapable. Which is a very un-romantic ending, because it leaves the world with 2 emotional cripples.
For me, friendship is also very much about knowing the limits of what i should make my friends suffer through.
I understand most people are more calculating. My own family who would keep tabs of what they give and receive so to never feeling they're in somebody#s debt. I'm like that in business situations, and to those who I know would do it to me, but not to those who are close enough to consider friend.
> for me, friendship is also very much about knowing the limits of what i should make my friends suffer through.
yes, this very much!
The medical term for what you are talking about is compassion fatigue. It's symptoms look a lot like depression: "People who experience compassion fatigue may exhibit a variety of symptoms including lowered concentration, numbness or feelings of helplessness, irritability, lack of self-satisfaction, withdrawal, aches and pains, or work absenteeism."
Really, though, friendship isn't a commitment. I am friends with people I enjoy spending time with. I have plenty of people I am no longer friends with because we stopped having things in common or geography got in the way. That's not a failure on them or me as people. I've made new friends and so have they.
I don't feel bad about saying no to things I don't want to do. I don't want to spend time with someone who isn't fun to be around. With some close friends, I will, out of some sense of obligation or caring about that person. With most friends, I don't feel responsibility over their emotional state, and would rather support my own.
I don't know if you have ever dealt with the latter, or if perhaps you are part of that group, but encountering someone who is can be enough to turn you away from ever potentially being involved with anyone displaying depressive symptoms. There's just too much risk to one's personal life and well-being if they end up being the "bad" kind of depressed person, and not the "good" kind.