Related to that last point, you can help people a whole lot better if they trust you. Most people who’ve had a really shit time of, well, everything, have dealt with lots of people and institutions which just weren’t trustworthy - gave misleading explanations of things, committed outright lies to paperwork and demanded people sign off on them, offered things that fell through over and over again, twisted things out of context to justify denying people assistance, etcetera etcetera.
You need a lot of information to usefully help someone. But there are such strong incentives, around people who will maybe help you, to try to show them just the set of traits they’ll find most sympathetic. You need food stamps, you’re routinely going to bed hungry, but if you check the box that says you sometimes share food with your roommates you’ll get denied. If you get this assisted housing program your pregnant sister will probably end up living with you against program rules because you’re not going to leave her in the women’s shelter where one of the other women stabbed her in the shoulder. But you can’t say that or you’ll get nothing.
You really need pain medication to have any hope of getting through the day. But you’re not going to say that to the doctor or they’ll decide you’re drug-seeking and not help with the horrible digestive problem you came in with. You’re addicted to something and would love help to get off it, but if you say anything you’re going to be instantly off disability.
(This is, incidentally, one of the reasons I favor basic income; I think having to routinely lie about really important things to get any help at all is appallingly bad for social trust, the people involved, and particularly people who can’t/won’t do it and just get repeatedly fucked over by a system that presumes really high baseline dishonesty to the point where the simple truth makes you basically always ineligible.)
So, we have a system that actively and aggressively destroys all trust, and therefore means no one is acting with accurate information and can’t actually do much. And one of the things that genuine, sincere sympathy and outrage does is it establishes a little bit of trust. Not a ton of it, but some ‘oh, it actually matters that I am suffering, maybe it will still matter if I let it escape that I have more than just this one simple need which this program will straightforwardly fix’.
So it wouldn’t surprise me if it’s often really effective, as a strategy in some limited contexts, to have a ‘I extend a fierce and unconditional desire to do whatever it takes, to this one person in particular’ sort of mindset, because it may be the only thing that can actually establish you care enough that it’s worth giving you accurate information.
But also it remains true that inhabiting that mindset will make you burned out and miserable, not even just ‘in the long run’ but often over the course of a couple of weeks or months.