I say this topic is legitimate
I understand the question and I have this to say:
My fursona is me, however I am not it.
It is a pure representation of myself only as an anthromorphic fox.
I have looked up a lot about foxes and I feel the fox best represents me on similarity of traits and associations.
For example I am smart, I am witty, I chose stealth over brute force.
Also looking at cultural interpretations of foxes, the celts saw the fox as a guide who knew the forrest as it was it's home.
The japanese saw it as a messenger from the dead.
In a nutshell, my fursona is a fox because it is the animal I most relate to, other than that he is a perfect representation of myself.
I like symbolism