Does rng scale with gathering on Fsh?

[TallonOverworld]

Perception has nothing to do with catching rate or size. Size only matters for collectibles and its only affected by gathering. There is no doubt that fishing is shady but what has become clear is that no matter how much gathering or perception you have there is an invisible cap for either big or small fish nq or hq.
At least for hq rate, i believe it should be ~15% up to a max of 20% (food included) +50% if patience I = 65-70% hq rate which could be possible.
But i couldn't agree more that the whole thing is a mystery and we may never find out how it works....I for one, find perception to be useless for fisher as there are two "patience" to deal with the hq rate. I can't imagine someone to try to fish double or triple mooches without patience and just rely on perception.