A Quillette article currently on the sidebar about Direct Instruction, a formal version of the general idea, which has more than one meaning. I have written in the past about the better results one gets from phonics and drill-based math than the inquiry-based methods. Yet the ed schools continue to insist otherwise, to the point of not even looking at the data.
Some may draw a connection between the way teachers tend to plan classes and the popularity of inquiry learning—as a teacher, I know it is possible to keep students busy investigating, researching, and presenting their ideas, perhaps with a poster, without having to devote as much time and attention to the picky details of producing a more structured plan.
Well, I hope that's not the reason. But I do remember that making posters, displays, and drawings often took up quite a bit of time without imparting much information. A very small amount of info could make a lot of display.