I suppose if there were a script that took a folder full of images and automatically placed them in a grid on a page, where the end result would be a group of image elements just as if one had placed them manually, that would be fine.
The danger, as I see it, is implementing some new stand alone construct that prohibits freely editing the resulting layout manually. Does that make sense? Inflexible superstructures. Like preconfigured grouped elements that can never be broken apart.
I’m not sure I have the vocabulary to speak of this in terms of software design. To adopt the metaphor of architectural design, if an architect were limited to the use of a small number of prefab wall and flooring units, as opposed to having the freedom to arrange individual bricks, lumber, windows, doors, etc., we’d have an uninteresting uniformity in our built environment.
I guess there’s a balance to be struck when designing a website building tool between offering basic individual elements and complex prefab units. Prefab units could be useful, as long as the app preserves maximal design and layout flexibility.