Yep, judging is always subjective. It’s what that specific judge (or panel of judges) saw, weighted against their own biases, both in the sport itself, and the players/teams/countries competing.

Unfortunately, that means results are often unfair.

This case is particularly egregious because it seems like the judges actually agree they made a mistake, but the correction was appealed purely on pedantic adherence to procedure.

I.E., no one is even disagreeing that she should have won the bronze if her performance was judged accurately.