Because you won't be dead "soon enough" to suit them. That's the point of taking action.
A lot of people wrongly assume that they are smarter or stronger than others when that is not necessarily the case. It's just that Life has been relatively gentle with them and has not tried them as severely at their vulnerable areas.
Everyone has breaking points...plural.
There is an end to what a person can take.
If you haven't found yourself there...yet...you have just been lucky. That's all.
When you think you have gained a sense of mastery over Life or are somehow immune to certain trials, take heed, since it may be that you will soon fall.
I think suicide may be a reasonable choice sometimes, when i get old if i learn that i have have a terminal sickness which will put me in bed like a veggie for years and my family will have to take care of me, i will certainly kiss the end of a shotgun.