I have used WordPress before and it was horrible!
WordPress (WP) used to be horrible to use, but so much has changed.
Why don’t all websites use WordPress?
For simple websites it is possible to use super cheap services like Wix.
Wix allows anyone to create their own website. It is great for hobby websites and small shops but is not fast or flexible enough for professional usage.
For large high-volume websites such as used by Qantas or the ABC, they will have bespoke sites built from the ground up but of course they pay for large full-time teams to manage them.
We love WordPress
WP makes it possible to make almost any website with a huge range of functionality all within the budget of most organisations.