They seem to be using “sprint” and “death march” interchangeably. These are two entirely different concepts. Sprints are just a way of breaking up work into discrete periods of time. There’s nothing about them that implies “drama, broken marriages, or broken families”. If you don’t finish the work you had planned to during a sprint then you fail the sprint, talk about why during the retro, then do a better job of all…
That’s absolutely not what’s written there and I’m surprised the context - and the narrative goal of the article - is not being grasped.
To put it more simply and distill it even more the gist is: “senior professionals know how to work and can manage their work structure/pace”.