When automatic generators are genuinely useful
Automatic and AI dot-to-dot generators are great when you need a quick experiment. They reduce setup time, can generate something from a photo or prompt in seconds, and are often enough for personal use, casual classroom fun, or early concept testing.
If the goal is simply to create a fast activity and move on, automatic tools make sense. They are especially attractive when the user values speed more than they value line fidelity or production control.
Where automatic generators start to break down for printable sellers
The trouble starts when you care about the quality of the final worksheet, not just the existence of a worksheet. Many automatic tools flatten the source image, remove too much of the inner detail, or create a route that technically works but does not feel designed for a child or for a sellable page.
If you are creating for Amazon KDP, Teachers Pay Teachers, Etsy, or another commercial printable workflow, the cleanup cost after a weak automatic result often matters more than the speed of the first draft.
This is the main reason manual control still matters. A puzzle page that looks random, overly faded, or hard to recognize adds friction to the production process, especially when you need consistency across many pages.