Adding to your comment:

There's a lot that cannot be quantified as well.

For example, some doctors I trust more than others because I think their diagnostic skills, empathy, listening skills and ability to absorb case knowledge are superior to the generalized level of their peers' abilities in the same area.

However, I wouldn't want someone to make an Excel spreadsheet with every patient's assessment of his/her doctor in the same way, since I think most patient's judgment skills will be on a similar standardized level that is below what I would need.

It's sort of like martial arts fighters. We can measure number of wins/losses at tournaments, but we can't assess how well they'd do when approaching an unknown situation with assailants who do not play by the rules.