Fish have no reasoning power, so go figure.
Fish have sense(s) - that's it - and not the kind that involves decision making. Fish brains don't have the abilities so many have compared to mammal brains such as fear, anger, gluttony, a sense of danger or threat avoidance, object identification such as comparing a lure to a live animal and especially not line avoidance. Seeing as how fish senses are honed to detect, track and target moving objects in a less than clear environment, anglers IMO need only do a few things to overload those senses and trigger the other thing we depend on - aggression:

1. tailor the object to what a fish will strike which includes size, shape and most important - the right action. If the line distracts attention from the lure or doesn't allow it to move exactly the way you want it to move, the line is too heavy. Lures must always be the center of attention and attention holding.

2.Line that has too much bow when using light lures, reduces subtle strike detection. Braid and large diameter mono are notorious for line bow the longer the line retrieved below the surface, making fluorocarbon leaders almost a must.

3.Line must have the least stretch (braid) for long distance hook sets. Mono falls short unless a medium action rod and high speed retrieve reel allows it but then makes working ultra-light lures much more difficult because of line bow.

4.Not much more to add except that smaller diameter lines in my experience do better on average, whether braid for the main line or fluorocarbon leaders. Once you find the pound test combination that works, always use it. I rarely use less than 6# test fc or a greater pound test than 10# for braid and I average over 40 fish per outing.