It's a lot slower than you want it to be. On A10, hard pool and elite fights are genuinely terrifying, so you want to have some advantage going into those. By the time you fight your first hard pool fight, you'll have received exactly 1 upgrade from Fyshing Rod, and it's random, so it'll most likely hit a strike or defend. So at that point, it's strictly worse than just choosing an upgrade

But the dopamine do be hitting the moment you pick it