Ok. They tell you to fuck off, as was included in the problem statement. They latch to their propaganda based beliefs because that's how it works when there is constant reinforcement, as was implied by the problem statement. They continue to be at risk for a lot of terrible things, often including being abandoned by family when they've gone too far down the rabbit hole, which is a real thing that happens. Now what?

You seem to believe liking things equates to willingness to do them. Intervention is a common thing when people put themselves in harms way. Be it a child reaching for a stove, an alcoholic hitting rock bottom, or a dementia patient being placed in a care home. We fuck with each other's agency all the time when the alternative is worse. And pretty much every instance involves a lot of heartache and doubt (other than the stove thing).

I also don’t ascribe to the notion that the ends justify the means.

Really? Cause I'm really not a fan of stabbing people as a rule, but when it's done to remove a tumor it's alright. Ends don't inherently justify the means. Murdering a bunch of people? Pretty hard to justify and is the basis of a lot of villain arcs when it's tried. Removing a redundant TV channel? Lot easier to feel fine about in context.