One-click unsubscribe – close enough?

Most marketing emails do this right. Some are close. Other require a login. Clearly if I have to login, they haven't achieved on-click unsubscribe. What I want to discuss here is the "close" situations. I just unsubscribed to a NVIDIA marketing email subscription. The email link did not immediately unsubscribe me but instead went to a page with an "unsubscribe" button. I clicked the button and got an error message: "Please confirm that you are not a robot" but since I use ublock, the CAPTCHA control (3rd party javascript) didn't get rendered. Anyway, I found this annoying and wondered if others thought that NVIDIA had failed to deliver on "one-click unsubscribe".