Yup, Harper didn't run out a fly ball and had been benched for that in the past, much like Rollins and Herrera. Honestly it seems like an especially dumb issue for Harper 2021, really you can easily argue he hustles too much as well as not enough. Same goes for his health - if not running hard out of the box keeps him in the line-up at 70% or whatever, that's surely still better than more days off or worse, an outright injury suffered while running hard on a fly out.
Kind of ironic that we just lost Segura to a "hustle" injury, whereas McCutchen two years ago was injured on a play where Segura didn't hustle.