I feel like your last point does not address my criticism. The devs should feel like they have control, not the management, I agree. But my argument is we extend that control to allow devs to pull new tasks into the sprint if they are done.

Sure, you’ll have to explain the optics to management when they ask “how come the devs get to control their own process instead of me,” but with your conviction in the Scrum Master role, I’m sure that wouldn’t be too big of a problem, and would allow for everything you and I are arguing for, right?