At this point, the people who refuse to see what's right in front of them are dead men and women walking. They can't be saved or informes. They're like zombies. It's a choice for them.
For those who know, they fall into two camps. Those who want to try to aurvice as long as possible, maybe influence in small ways how collapse plays out and those who just want to live their lives out, kind of nihilistic maybe, but they've accepted they're going to die. Maybe they've made plans for opting out when it gets to 'that' point for them. They just want to enjoy life until then..
We do what we do for both camps. For the latter camp, it's solidarity, respect for their choice, community, etc. For the former group, it's because there's a lot there, right? Easy to miss things. It's brainstorming and compiling knowledge and strategy. Survivor communities. Knowing you're not alone. Hope in resistance. All the things. And also so we won't feel as alone with it all ourselves.
Keep doing what you're doing.