Ask HN: Do we need Google captcha?

Many of us remember the early batches of captchas. Annoying and sometimes next to impossible to get right. Googles "one click" captcha was a fresh breeze when it came. I'm not so sure anymore though. Now instead we have to use brain power to press 2-4 images in an AI quiz or said differently "help Google improve their ML data-set for free" which I'm not at all comfortable with. Isn't there a better way to fight bots? Could not the community make a FOSS alternative? How hard is this really?