Buddhists say the exact opposite - suicide is a temporary solution to a permanent problem.

Death is inherently permanent and life is inherently temporary. Any life problem is still ultimately temporary.

And just because a medical condition isn't "curable" doesn't mean it isn't "treatable", and treatments continue to be developed.

And, with many medical condition, environmental factors can significantly change quality of life.

One can't definitely know what their personal experience of an incurable medical condition will be in the future.

Edit: what I just said but in meme form:

people are uncomfortable accepting a person’s mental health can be so debilitating and detrimental it makes their life unlivable. treatment resistant depression is a documented illness. each person is fighting a battle only they know the extent of. people want to believe that treatment is a guaranteed success if you do it the right way (this is subject to change from individual to individual). they’ll acknowledge the fact that mental healthcare is a disaster (if you’re in the US) but talk like you’re giving up for ceasing treatment. regardless, the unwillingness to validate suicidal people’s pain is why you hear these kinds of things.

Oftentimes people ignore that depression is also a product of a system that prioritizes profit over everything else including mental and physical health. You can go to therapy all you want but it doesnt put more money in your pocket or lower prices to lower financial stress, decrease food insecurity, doesnt increase job security and satisfaction, doesnt give you back the time your employment has robbed from you, doesnt improve relationships and your ability to form them, doesnt make third places pop into existence, etc. Therapy cant remove those factors that cause depression in the first place. I have increasingly heard stories of people going to therapy only for the therapists to realize that they literally cant do anything about the stressors because modern life is so systematically stacked against the individual.

I’m curious who says depression isn’t curable. I hadn’t heard that before.

I think this is very colloquial, and I'm gonna take a crack at the interpretation:

Depression means a depressive episode, or a depressive disorder (featuring those episodes). Usually depression can't be cured or healed, but you can go to therapy some people manage to accomodate for it or have preventative measures in place.

Depression can be triggered by lots of things or nothing at all, but iirc there's a genetic component to it.

For all those events that trigger it, those don't last forever and maybe the depression is dependent on the trigger. If so, killing yourself means there's a life without depression you will never know. You could view the depression as temporary, and killing yourself as permanent.

With the genetic predispositions and randomly triggered depressive episodes or depressive disorders that last forever it's harder. However, what if you find a way to deal with it, but you need to get over the worst part of your depressive episode? Then you might kill yourself, and you never know there's a normal life out there you could have lived.

I think this is what people are getting at. That you never know whether it just took not killing yourself on that one day to get back on track and maybe live a more fulfilling life right after.

That said, there's plenty of bad situations where things only get resolved if you manage to physically change your habits or social circle. For these, if you're forced into your circumstances, I can totally say people arguing that there's no way out. And I should also point out that if you're killing yourself, you have not given up, but much more importantly, society has most likely failed you in multiple significant ways.

Don't KYS!