How is it possible to have a concept of "doing X thing well" without, implicitly, saying X thing is valuable?
Because, generally speaking, "value" is subjective. You can see that a car has amazing acceleration and top speed, and that the engineering to do that is well-done. But you have no desire to drive fast, and need cargo space. The sportscar isn't a good car, for you, and it is not worth the $90K the dealer charges for it.
Or, as a better example, a movie. Sin City.
My wife cannot watch this movie. It is full of violence too brutal for her to watch. She can recognize many of the film's technical accomplishments. She can see that the film does exactly what it sets out to do. But, for her, what it sets out to do is not watchable - and if you can't watch it, it cannot really be called "good", now can it?
Thus, scoring well on a particular set of metrics does not mean "good".