I think that we're thinking of problems with a different scope.
You seem to be talking about fears that are fundamentally
not unfounded or irrational. In fact, the examples you gave are of things that
FEMA says you should do as a responsible homeowner, in case water utilities stop working or there's a multi-week power outage. The strategy you describe works for fears that are
well founded but that recur after you've addressed them, fears where your brain can
accept that it's done everything it could.
The fears and anxieties that I think we're dealing with are not those fears. There is nothing you can do to convince these fears that you have done everything you could do. There is no FEMA guide for disaster preparedness, no recommendations from personal finance experts about your emergency fund, no Scouting organization to tell you what the Ten Essentials are. These fears cannot be appeased. They come back up no matter what you offer. And when they do, they come back
stronger. Acting to satisfy them teaches your brain that it was
right to have those fears, that they
are rational. The next time it brings up its irrational anxiety or unfounded fear, you will be unable to argue it down by pointing at what you've done because it is
unfounded and
irrational and has already rejected what you've already done. And if you try to appease it again, you are in a downward spiral. These fears aren't "What if there's an earthquake and we lose power". These fears are "What if FEMA's guidelines are insufficient", or "What if I have an unknown medical condition that means I need twice as much water", or "What if my water gets polluted", or "I need to double-check the expiration dates again", or "What if it lasts
four weeks instead of the two that FEMA plans for".
The techniques I know focus, first and foremost, on learning to identify and displace or reject unwanted thoughts. Coping strategies, things like making plans and becoming prepared, can help, but not when used directly. Using them directly is worse than useless for the reasons I described above. Instead, coping strategies are there to help me teach myself that I am
able to reject unwanted thoughts. Once I have learned that, I can learn streamline the coping strategy until it's barely a strategy any more, just a mantra that dispels bad thoughts, or I can learn to reject the thoughts without needing the coping strategy at all. Sometimes coping strategies aren't related to the unwanted thought at
all, and involve simply knowing how to force yourself to not think the unwanted thought, commit to a task that permits your undivided attention ("go play a video game") or engage in a behavior that replaces it with other thoughts ("go talk to someone") or adjusts your neurochemistry in a helpful manner ("go eat ice cream").
If we're going to be helping Homura not worry about things, we don't need to be teaching her that she should be readying herself for this loop to end. We should be committing to making this loop work. I'm fine with her collecting rocks and mops and shit, because like you say, those will be useful even if we beat walpurgisnacht and continue onward with this loop. But I don't want to reinforce the idea that it's okay for her to worry about Sabrina failing. Our success is the only thing holding her together right now.
If we could convince her that she could handle our failure, I'd be on board with helping her learn to overcome her fears. But that's not what you're doing, and that's not something that I think would be a productive use of our time. You yourself pointed out that our failure would be
catastrophically discouraging. Everything we've done this loop has driven Homura to believe that her current methods are
wrong, that's the entire thing she's been demonstrating with this update, and she's been locked into her current methods so long that they
are her. Helping her overcome that would be a monumental task. This isn't something where we help her overcome normal anxiety about an uncertain situation. We'd need to completely resolve
all of her trauma, all the way back to the
third fucking loop where Madoka demanded a promise and a merciful death.
I think that it's safe to ask her what would help. I think that it's safe to ask her what we could do to make her feel more secure. I think that those are reasonable first steps.
But I also think that we must remember that the patient's current coping strategies are not necessarily good for them.