That's because you seem to be halfway through making an account and they want you to finish.

The actual behavior of Quora, if you aren't midway through account signup is:

if you go through Google search it shows you the page promised.

If, from that page, you click on another question it will open the second question but give you the sign up modal. You can bypass a signup modal and get the normal page by appending ?share=1 to the end of the URL.

I don't even have a Quora account but I read the ?share=1 trick a while ago on hacker news.