> Healthy, sane people in good situations don't kill themselves.
Correct. This has no bearing.
> it ended up killing some of them.
No, and it's irresponsible and unhelpful to act like agency and choice is not part of the equation. As if to say that basically everyone chooses the same way (euthanasia) in the face of terminal illness, or depression.
Tautologically, if you want to convey that help is out there and that a better life is possible, then you're saying people have a choice to make.