I did consider things like that to be under the case of terminal illness yes. I do understand that circumstances, especially around such disease, can bring about extreme suffering, and that the way brains process pain can override a person's normal feelings on the matter and make them seek death to end it. Its just that, I think that an end of existence (which, not being someone that believes in afterlives, is what I believe death is) is the worst possible state, worse than any amount of suffering (even an infinite amount of such, not that a human can actually process an infinite negative stimuli). As such, I view it is as more ethical to extend life for as long as possible than allow it to end early.

I acknowledge that a person in great pain will likely disagree, even myself if my life brings me to that, but I dont take this as actual evidence that the pain is worse, because pain shuts down a person's regular thinking and can in high enough amounts override that persons values and ability to think clearly about them. In other words, I think that a person, any person, even myself, that is in sufficient pain will consider that pain worse than death, because pain is almost like a sort of mind control in that it forces you to think that way, but I think that person, even myself in that hypothetical, would be wrong about that. In the same way that if some cruel inventor devised a machine that manipulated a person's mind and forced them to have suicidal thoughts, I would think it wrong to let the victim act on them.