Why do you think Bi-Wiring improves the sound ?

To explain , when I said converting to bi-wire I meant adding 
speaker posts and re-configuring the crossover wires .
One guy did a test using individual wires of 18 gauge ( 1 @ for per post )
after liking the bi-wire configuration he re-wired the crossovers back to a single wire setup and then used both 18 gauge wires ( 2 @ per post )
he  like the sound of the bi-wiring better !
so increasing AWG was not a factor in his conclusion .

Lol! To explain, my post is so clear it doesn't need to be redone even in the face of this new information.

There's no reason to add extra binding posts on the speaker to simply bi-wire, if you were going to bi-amp that's different.  There is no technical reason bi-wiring works there's scientific reasons it doesn't.

It does seem to work for those who have tried it
but there is no way to measure or prove why it seems to work .

This is why I am asking the question .

As for kool-aid  It worked for the Grateful Dead !

No it doesn't necessarily work for those who have tried it. I've had bi- wired speakers never made any difference there's no reason it would.