Yes; each of us can claim the best. (It is not intellectually honest if each if us is claiming the best as some kind of objective truth, but, yes, we can claim it.)
An objective truth based in a single subjective opinion is meaningless. Subjective opinions must be analyzed statistically before they can claim such status.
And this is what suggests, if not proves, that the process is subjective.
The process is subjective because it is based on perceptual information about an incomplete and inaccurate reproduction of reality. Diversity is a consequence, not a proof of anything.