But how can you ever have the confidence that your other options will continue to be worse over a longer time frame?
Almost by definition, if you are in the state of mind to consider suicide, you are probably not accurately and impartially weighing the question proposed — and that means it’s likely mostly independent of individual circumstances and values.
(This is different to how I felt when I was younger, and coming from someone who has had several people close to me feel that way at one point in their lives, and now living incredibly positive lives a few years after the fact)
I can see some limited circumstances where it is carefully and openly considered over a longer period of time — like a terminal illness, or unbearable and unsolvable chronic pain — but those cases are the minority by far.