Too many points into a ship that may die turn one but will 100% be dead turn two.
Amazing how you can give such a subjective opinion, and make it sound as if it is an objective truth.
It's a one agility ship worth nearly half your points so it's a priority target in most circumstances.
Odds of getting one evade without an action to mod the dice are 37.5%, so more often than not the shot will go through (assumes you target lock to fire torpedoes next turn)
Average firepower in most lists is 8-9 dice, but can go as high as 16 if you swarm.
So odds are most of those attacks will get through severely damaging the y-wing if not killing it.
This is logic, it does not require an opinion it is a set of facts weighed to produce a reasonable conclusion, which is what I expressed.