You're right about subjectivity and we all have similar stories. But objectively speaking, there's no reason to score 3.6 given aiden87's academic record. And I think that's the problem that being highlighted here, which is that sometimes the scores are unreflective of the candidate especially in areas where subjectivity isn't an appropriate excuse.
I do believe that Vanier is much less subjective given how they score the candidates - it goes through two rounds of review and each round is headed by a committee of professors (fortunately not just based on the scores of two professors). Also, it is much more difficult to judge the subjectivity of the Vanier process given that they release very little information to applicants in terms of the specific scoring in the different areas (they only provide an overall score in academics, research, and leadership without the specific breakdown unlike CIHR).