I've already said I think fishing, being a form of hunting makes an odd symbol of peace.
If I was going to accept it as symbolic I would have to go with either survival or back to basics (given almost all technological advancements in FFVIII are used for war). The only technologically advanced, and genuinely peaceful race being the Shumi. Of course then the world's history is that of war from very early on so it may be the wrong conclusion. Then again, FH is an offspring of Esthar, and pretty much takes back to basicsto quite serious limits (considering the engineering ability of it's people).
It would seem odd that the makers would relate either hunting and/or primitiveness with peace.
I think I made a point there, but to be honest this constant search for things the game might be about seems to just be an excuse to make up for lack of real content.