Consider nearly any professional sports team and the relative effort that athletes put in. There's very little disagreeing on objectives our outcomes (score/prevent points, win games) and incentives are directly tied to this (win more games, get more money).
And yet when you listen to what some of the highest-performing athletes say, they'll readily admit they don't go 100% effort 100% of the time. In fact, that's often a very bad thing to do because you can burn out quickly, and then the opposing team who paced themselves a little better starts running over you. However, there are spurts of intense activity where you really do go 100%, and then you quickly dial that back again to make sure you have effort reserved in the tank. Ideally you get down to 0 at the end of the game, but it's also readily acknowledged that sometimes this is out of your control, and often in quite significant ways, like the football bouncing weirdly when it popped out of someone's hands.
All of this is to say that there's a deep obsession in the corporate world around efficient teams performing labor, but when you get into organized sports where there's literal teams fighting for an objective, they don't chase "efficiency" that would amount to "time doing useful things on the field". Such a measure would be ridiculous.