It doesn't necessarily AUTOMATICALLY respond and it's not all the same. It kind of depends on the circumstances.
There are times when the mind and body combine to lock up based on the stress of the situation and money involved or lost. It goes in slow motion and some bad stupid mistakes are made because you aren't thinking right. The vision gets skewed and things look differently.
World class tennis players start hitting balls into the net or out. Top baseball hitters get frozen at the plate and strikeout every time at bat. And pool players miss easy shots and start dogging it like they have cerebral palsy.
The mind is a great thing until it's no longer a great thing and turns to mush along with motor and coordination functions.
Then we play against someone like James Aranas or Tyler Styer only to realize what it feels like to be a mental midget, comparatively speaking.
I honestly feel your intentions are good but sometimes I think you missed your calling as a rah, rah Pollyanna motivational speaker where everything works perfectly and positively to a best scenario conclusion. But in reality, ca-ca happens since we aren't machines and there is such a thing as emotions, nervousness, pressure and not so good decisions taking over.
You're right. Even though the "automatic" function works exactly as I described (visual input triggers automatic brain response based on experience), the automatic response isn't always perfect, mainly due to lack of experience/development. And ss you pointed out, there are other factors that influence the process, like emotions, nerves, pressure, etc... We certainly aren't machines.
Once you've learned/trained yourself to perform something that involves hand-eye coordination or muscle memory/motor skills, your subconscious knows 100% how to physically react to what you see or feel, automatically. But when your conscious mind attempts to take over that automatic process, the results may or may not be 100% what you want or think. More likely not, because the conscious mind is too often under the influence of other factors that can sabotage the performance process.
I think it was in "The Inner Game of Tennis" where the author says you can think of the brain as having two selfs, self 1 and self 2. Self 1 knows everything about playing pool. It knows how the body should stand, how the stroke should feel, how to look at the balls, how to strike the cb. But self 2 is the actual doer, the performer, the one that automatically does what it has been programmed to do. When first learning how to do something self 1 is in control of gathering knowledge and performing actions based on that knowledge. But eventually self 2 (through synaptic pathways) takes over the performance part. Self 1 then simply has to gather and evaluate data, deciding what needs to be done based on acquired knowledge, then self 2 automatically does it. When self 1 thinks it can do a better performance job than self 2, the performance isn't automatic.
Self 1 needs to step aside and allow self 2 to do what it has been programmed to do. But stress and emotions, the fear of losing, or fear of winning, not playing in the moment, etc... causes self 1 to take the wheel. And when this happens nothing is automatic, because self 2 (the automatic performer) is not being allowed to perform.