> It's shocking to me that, sometime in the last 10 years, everyone forgot that adblocking's primary argument is security.

I’m not sure about that. I suspect people don’t like how intrusive ads are. Especially in videos.

The security issue strikes me as a post Adblock rationalisation. People know how the sites they visit are funded and need some way to justify cutting that off.

The number who understand the security implications is going to be very small.