Most of the time in development we need to slow down to go much faster. It's nothing like white water rafting (it would be cool though if it could be like rafting sometimes - everyone gets sick of having to slow down all the time at some point)
It's not democracy per se: for instance a designer can come with a proposition to give people a chance to review it. In the rafting example they're basically saying "we go right", and will do so if nobody shouts "there's a cliff on the right".
Having a single captain can still be a democratic system; what is being replaced isn't the democratic element (where power rests with the people) - that is still in place. What is being changed is swapping a deliberative assembly (or committee or something) for a single executive for making decisions.
So what is being identified is technically something like 'deliberative assemblies are better at dividing up resources and responsibilities but single executives are better at implementing policies and achieving outcomes'.
Interestingly, this is a lesson that is implicitly very well understood by major democracies without being explicitly bought up very often.
Stop! Pedanto-Time!
^_^
but when the game gets competitive, it's easy to fall apart and get beaten without a leader. on offense, that's usually the point guard (e.g., steph curry), who implicitly chooses who gets the ball, when they get it, and for how long. on defense, a forward/center (e.g., draymond green), who can see the whole floor in front of them, often has the responsibility of coordinating the defense to minimize gaps and mismatches.
I believe most people would appreciate if they weren't infantilized and forced to defer to some dysfunctional hierarchy.