Many smaller websites benefit from using WordPress.
It's the most popular content management sytem (CMS) in the world. This offers more certainty, as many development companies will be supporting WordPress for a long time to come.
A word of caution: Due to it's popularity some attempt to force wordpress into spaces it wasn't designed to be in. This never ends well. A better approach is to look at what's needed first, and then decide on a platforms fit best.
So many options! Because so features can be had through tens of thousands of custom plugins, we can install and modify them to build to your needs faster.
Sometimes a plugin falls short on one or more features. In these cases they can be modified or built from scratch.
WordPress started as a blogging platform and it still does that well. You can build all types of blog and news features using WordPress.
The backend administration of WordPress content is pretty good, adn many website managers already have experience with how WordPress adminitration works due to it's popularity.l
Open source means you can always modify any WordPress website as you see fit, to match your particular needs, without licensing hurdles and fees.