As do I. The hero image clearly says "SORRY ROBOT" to me, which is the message supposedly intended for AI... kind of a fail.
It's only when I squint hard that I can see "HAPPY HUMAN".
You’re doing it the wrong way around, try intentionally letting your eyes defocus.
"intentionally" letting your eyes defocus is not a simple task for most people. Because most people use their eyes normally, they can't do things that are unusual. Look at how many people struggle with Magic Eye stereograms. Squinting on the other hand is something that is simple to do.
Found the robot, y'all
Downsizing is effectively low pass filtering, so that's expected. Any scheme that transmits different messages in different frequency bands is going to be susceptible to a similar attack.