1. Wave of violence preparation dying down after the excitements of early 2019. whites settling back into the slow boiling of the frog. "We can vote/breed our way out of this" instead of the inevitability of armed conflict.
2. Guns as a tool philosophy - it's possible to acquire a nice arsenal but recognize that past a certain point, minor increments in lethality of your weapons are less effective than building a political movement or at minimum a small circle of friends who can stand guard around the clock on your compound.
3. The average /k/ poster on 4chan is likely less internet-savvy than some, and is more likely to believe that we still have freedoms such as freedom of speech, freedom of thought, freedom of assembly. They see little harm in allowing a corpus of their posts to be assembled against them for later use. Perhaps also they live in particular state jurisdictions where they percieve they are less likely to be effectively Red Flagged for wrongthink.
so some combination of lazyness, stupidity, and apathy.