Another question that’s more about prompting thinking than about the answer itself. Especially in a small business where everyone wears many hats, it’s easy for everybody to think somebody will do it and in the end nobody does.
You don’t need to choose your most technically proficient person to use WordPress. Better to have someone who loves this type of puttering take care of it, even if they need to learn a few skills and even have their work reviewed before it goes live. Let the driver be someone who enjoys this, and they’ll nudge to get it done.