As the rider of a horse that pulls a lot of spooks, I recommend going by your good instinct for your horse, based on each individual spook situation, and based on the results of your course of action. I think spook-iness or look-iness can be a bit different from horse to horse, and even from one spook to another.
My horse learned to use spooking as an evasion, an unintentional fallout of his early training. He learned to use spooking to avoid maintaining focus, and to re-direct whatever line the rider has him on. Something that started as a natural reaction grew and grew and grew into something else, over the course of years. For that individual horse it is not about what he is spooking at; it is about the spooking itself, and the benefit as he perceived it.
Maybe what is most important about the spookiness is not so much that she does it, but how you react, and any result she might perceive as a reward/benefit, even if unintentional on the part of the rider. Does she stay on task? Or does she get a break and a sympathy pat that she may interpret as a reward? As time goes on is she spooking more or less often?
I don’t believe there is one answer for all spooking. I do think that a thinking rider that understands horses is often the best person to know how to handle it. Good instincts as a rider, for each situation, is what I think you should put into action.