Not only that. Agile processes in general are supposed to protect everyone from sinking a tonne of effort into successfully building the wrong thing. It doesn

Not only that. Agile processes in general are supposed to protect everyone from sinking a tonne of effort into successfully building the wrong thing. It doesn't matter if people aren't going as fast as they otherwise might, if the counterfactual has them going in completely the wrong direction. Scrum itself is more specifically designed to protect the team from management interference. Engineers might think it's a waste of time preventing them from getting things done, but in its absence (where it's truly needed) what would actually be happening is constant micromanagement, context switching, and death-march deadline pressure. In its originally-intended form it's not an arbitrary collection of hand-holding niceties, it's a self-defence measure.