Few people take potential threats seriously until they see something happen with their own eyes, it's just an inherent flaw in humanity.
I think there's also an underlying problem that causes a lot of "influencer" problems in that streamers/YouTubers etc. do not see themselves as celebrities, so they don't develop the same self-preservation skills and sense of responsibility that a mainstream celebrity who spends 12 hours a day being chased by cameras would; and honestly, why would they? Most of these people have little-to-no irl work experience, having left school and spent a few years living as a neet, ending up streaming professionally without much thought. Their average day-to-day life is almost identical to the time they spent as an unemployed nobody, so the idea that they're being watched and are a target for bad actors now won't have sunk in properly.