@calcifer This is actually a really important thing to bear in mind, in all sorts of "helping" positions. Amongst mental health workers, there's a known condition called "Compassion fatigue", it's where you just "burn out" helping people and forget to look after yourself.
Having a person to help take some of the "mental load" is really helpful, be it a friend, neighbor, religious person (or even therapist) is extremely helpful. It is going to be hard for someone in that position to take the assistance of those they feel they should be helping though.
I have seen this a few times with people who give of themselves, but haven't received training in how to deal with their own self care, and they seem to react well to comparing it to something like a plane flight, and you get that speech about "put on your mask before helping others"... I then explain how, in such a situation, even if they think can help someone else quickly, they don't see the strain this is putting them under. Sometimes taking time to help yourself, actually helps people better in the long term.
And this is the case, even if the person doesn't have acknowledged pain or trauma in their history, and also that some of us... are great at (to borrow a phrase from the ASD community), masking.
Self-care doesn't need to happen alone. And sometimes, self-care needs to be mandated (or just triggered) from outside.