Spooking sucks to ride. It is jarring, potentially unseating, and depending on your skill set and the severity the emotional response can range from frustration/annoyance to true terror. I think this combination of physical and emotional discomfort makes it really easy to project human-type thoughts into the mind of a horse that there is a mischievous or even malicious intent specifically aimed at the rider. The spooks I’ve ridden (or not stuck!) made sense in the mind of the horse. It could be a auditory, visual, my own anticipation, anticipation of what happens at a certain spot, etc. but in time I’ve been able to unpeeled the why. I also think that most horses who do what I’ve heard termed (and dislike hearing) a “stupid spook over nothing” are Warwick Schiller style stacking stressors and finally the smallest thing results in a spook because they are really over threshold. Again, I don’t see that as a fake spook but just the way a horse is trying to cope with being overwhelmed.
It isn’t an exception but in a separate category are horses that learn a combination of behaviors like a spin and bolt or shoulder dump can stop a ride either by unseating the rider or the rider stops and gets off. I think of that as less of a “fake spook” or “get out of work” but rather a horse has been overfaced or hurts and inadvertently found a way to make the discomfort stop. If everything is resolved I think a horse can and likely will continue the behavior for some amount of time until trust and relaxation returns.
Specifically to the OPs situation, there is probably an intersection of genuine concern and very understandable rider anticipation. I admire you are advocating for your horse and it can be challenging when an otherwise good horse person wants to hold on to an antiquated notion.