Well, if one tries to assess their performance compared to their potential, observing your peers can be a way to guess that. It’s not necessarily a matter of competitiveness as much as “this is the reference class I’m in, so this is roughly the kind of thing I can reasonably aspire to”. But if you’re on a class of your own anyway then you can’t even appeal to that—only look at the task.
Well, if one tries to assess their performance compared to their potential, observing your peers can be a way to guess that. It’s not necessarily a matter of competitiveness as much as “this is the reference class I’m in, so this is roughly the kind of thing I can reasonably aspire to”. But if you’re on a class of your own anyway then you can’t even appeal to that—only look at the task.