Doesn't that particular Captcha also work in an incognito browser? I don't see where all this complexity comes in. You simulate the mouse movement and the click

Doesn't that particular Captcha also work in an incognito browser? I don't see where all this complexity comes in. You simulate the mouse movement and the click. Your browser pretends to not be able to run webgl, so no ghost image. Forcing the user to have a history with google services would lock everyone out who's new. The user agent and other browser metadata is easy to fake.