In the popular context this always maps onto basic survival since it's very relatable and immediate: but for a person in a slightly more privileged state the problem is one of picking the thing to struggle with, because it's possible to walk away from so much of it, find a distraction and squander one more day. If walking away from everything were really the answer, suicide would be success, and we are disinclined to want to believe that. Neither does it work to try to engage with every problem you see as there are too many of those and you aren't going to be effective at all of them.
This motivates many of the conclusions of Stoic thought: the moderation, the development of awareness about one's sphere of control.
I've always admired stoicism but found that the principles aren't exclusive to this. Buddhism, weirdly Islam too, and no doubt other sub-groups of religions such as Quaker-ism.