In reply to Matías.

I’ve seen the opposite argument used against Gutenberg—that it’s meant as a page builder and not for blogging

Page builders are fundamentally not a great solution for CMS. I've seen too many people in business get mired in the choices required by page builders, when all they really wanted was to make some quick and necessary updates and get back to their 'real work.' The job of the designer/developer is to provide a simple, quick, and clean UI to make that possible (and for CMS purposes, WP doesn't come out of the box able to do that for non-developers).

Unlike many blogs, business/professional sites are maintained by people for whom fiddling with their website isn't the high point of their day.