Pollsters are stubborn folks, aren’t they? They catch an eternal load of grief for their unwillingness to admit error, to integrate new data points into their thinking, to abandon their preconceived notions of what teams ought to be good vs. those that have actually shown themselves to be so.
In a way, you get it — it’s hard to say, “I’m wrong” or to surrender a pet belief. That’s human nature. The only way to mitigate the baked-in biases we hairless monkeys share is to be aware of them, view the matter dispassionately, and then examine the world of is, not the world of ought.