There's a different "knowledge" problem that must be tackled here.

Someone can form a cognitive bias from only being exposed to a few ways to solve a problem. Maybe it's because they haven’t seen it to larger scale, or that they only worked with monoliths, and thus are limited to only that problem scope.

Throwing more MySQL databases at a problem won’t fix all problems, but for a lot of people, this is all they know. How do discover those unknown unknowns, to learn the applications of tools you haven't yet been made aware of?