How would you build a site like Yahoo Answers?

From today Yahoo Answers is closed. It made me think about why? Surely its really simple to run a site like Yahoo Answers?

I asked:

Then I answered:

1. Register a domain name in AWS Route 53 (e.g. https://kazooanswers.com/)
2. Start a Wordpress site using AWS lightsail and link the domain name from step 1 (https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-tutorial-launching-and-configuring-wordpress)
3. Install a theme ( e.g. discy https://themeforest.net/item/discy-social-questions-and-answers-wordpress-theme/19281265)
4. (Optional) Add social media login plugin for wordpress (e.g. https://nextendweb.com/)

Now the site is live here: https://kazooanswers.com/

So why are Yahoo shutting down answers? Its easy enough to run a website, especially for Yahoo!