Google's Fetch As Google feature within the Google Search Console now forces you to use a captcha each and every time you try to submit the page to the index. You can try it yourself, go to the feature under "Crawl" > "Fetch as Google." Then fetch a URL and then click the Submit to Index.
When you do that, this box will come up asking you to complete the captcha:
It is an easy captcha to click, but the captcha use to only come up every 10 or so pages.
I am not sure why people need to use the feature so often but if they do, it might take them an extra click to get the task done.
Forum discussion at Twitter.