Because the title is linkbait, and people are automatically upvoting based on how appealing the title sounds, rather than based on the content.

This indicates a more general problem for HN: how do you get people to vote based on content, rather than title?

I'm not sure I have a good, practical solution.

If you figure out how to convince the public not to vote on appearances, please share it in time for the next general election... it'd put a lot of politicians out of work.