You can certainly experiment and innovate. Nothing about agile stops you from adding an issue to spend half a day investigating the right tool to solve a probl

You can certainly experiment and innovate. Nothing about agile stops you from adding an issue to spend half a day investigating the right tool to solve a problem, or implementing something two different ways to determine the best one. But by explicitly defining that objective and blocking out time to do that you de-risk the development process related to it. These "extreme" processes force you to define the motions (issues, work tasks) and allow you to practice getting them done using the same process over and over again.