Totally different type of latency. A person with a motor disability dragging a puzzle piece with their finger will look very different from an AI model being called frame by frame.

Round 2: Begin

https://www.youtube.com/watch?v=WqnXp6Saa8Y

That's a great video. To be clear, I'm not defending Captchas - I just don't know if I believe they're dead yet.