I think the argument to be made here is that gathering such metrics is difficult. So that's why no one does it.
Should we/can we improve upon it is another question.
We have metrics such as cyclomatic complexity, however they don't connect with software engineers yet to drive decision making from my experience.
I'd love to see the day when our profession invents and adopts objective metrics for attributes such as these so we don't have to rely on opinions.