While I do not currently feel such a level of despair...

I have had some very very dark moments (months, in fact), so I am able to empathize with those that do.  

I remember after my dad completed his cancer treatment. The topic of potential recurrence was brought up,  likely on or about the time for a yearly scan.  

I recall reacting physically when he said that if his cancer returned, (which we ALL KNEW had, in fact, a very high rate of recurrence) he would decline treatment.  

My immediate retort 

"oh, no,  you won't"  

And for several seconds,  I meant it.  

And my brain caught up and reminded me that it wasn't about any of us at all. 

While I do not have intent to plan an exit,  I'd never presume to know better for anyone else,  like how much they're "expected" to suffer when there's a way to end said suffering.