To change modules order in Darktable, you have to know what to do. By default, the module order is correctly arranged and no intervention is required. Changing the order is an option that you can use only if you want to. No user will ever change a module's order by mistake (and in the remote case that one did, fixing that is a click away).

We have Lightroom, we have Capture One. Let one software for more technically-inclined photographers exist, where you have options and power over the pipeline. Darktable does not aim to be a Lightroom replacement.