I agree that page builders are not something you usually want to hand off to a client. However, I have found the new crop of WordPress Page Builders to be useful even as someone who codes. Namely, in circumstances when budgets are limited and quick landing page iteration is necessary. If I want to change a section from 2 to 3 columns or insert a call to action block with a different image size, a decent page builder allows me to do it without diving back into the template. It saves me time as long as I can work within the constraints. In other words, a Clickfunnels-Squarespace interface (these builders are better than both of those) have their place—at least in my world.
That being said, I'd always rather use ProcessWire over WordPress. I wonder if one of the 3rd party page builder developers could be wooed to port to ProcessWire? Check out Elementor: https://elementor.com/ Brizy and Divi look decent as well.
What do you think?