I'm saying most of the topics we discuss are subjective by nature. Being objective on mathematics is easy as long as the calculation is within your competence range... however being objective in predicting the future of a player or a team in NBA is impossible even for the best experts on the planet. And we, as smart as some here may consider themselves, are not the best experts on the planet. So that make most topics we discuss subjective by default.
Only way to be objective in subjective matters is to take into consideration the fact that other people might notice things you are not noticing. We have 50 active posters or so which means 50 different eyeball tests are running each game. All are valuable and every test might notice relevant things that none of the others do. Being able to adapt your own opinion to that of others is the key. Doesnt mean being wishy washy or not having an opinion.. it means also being critical of your own eyes.
You are good at reasoning and usually have evidence to support your opinions, but you are not immune to subjective bias. Personally, I think objectivity is not even a goal to strive for, as in a perfect world you want to have people who look at things from different perspectives (unless its an exact science, in which case you just want the best experts opinion). Being subjective and biased is only harmful if you are completely out of reach for the voice and reasons of others... which unfortunately is quite common these days.