Would you say there are different levels of objectivity? Is objectivity an ideal we can only approach asymptotically?
Let me give you an analogy.
Not sure if you are a baseball fan, but the term "sabermetrics" has become big in the game in regards to objectively evaluating players and their value in the last 15 years or so.
In the past, the main way of evaluating players, was with scouts, who would watch the player perform and rate them in five basic areas; throwing, hitting, hitting for power, running and fielding. Scouts relied on their experience and their subjective determination of what they saw with their eyes. This type of evaluation, can be prone to bias, because each scout has certain things they may like or not like about a player.
Sabermetrics, was an attempt to analyze and evaluate player performances with statistics, that were directly related to events on the field, that impact whether runs are scored for your team, or runs were given up by your team. The formulas, to evaluate these players, are the most rigorous, when it came to pitcher vs hitter and are quite dependable in predicting how offensive data, will relate to scoring runs.
The sabermetrics approach is objective, because the numbers are the numbers and they tell a story. The pure scouting approach, is much more subjective and involves more intuition, or "gut feel" of how a scout feels about a certain player.
To me, religious faith takes the scouting approach of intuition and feel, and science is the sabermetrics approach, relying on the data, that can be quantified in a reliable fashion.