Why people use AdobeXD if it cannot generate (reasonably well structured) HTML and CSS?

As a person who had seldom to do with web design issues, I see all the enthusiasm around AdobeXD and I don't understand it. It would be justified in my opinion, if I could design my site and then quickly export this design to static HTML/CSS (or a static Android app, for example). But it does not do that, although it does have a plugin with such purpose - but the resulting HTML/CSS looks very bloated.

So what purpose, in simple words, it serves?