I think you were trying to say that it is important for new climbers to learn instincts so that in times of stress they will do the right thing (all the boulder, sport, trad and even AMC references are superfluous). But what you actually said was inconsistent. At one point you say:
any thing that he learned under stress will come back to his memory
and right after that:
under stress...you loose a part of your capacity to think correctly
So WHAT is your point?
Our mind work consciously and subconsciously. Instinct is learned subconsciously...so when you lost your capacity to think correctly under stress, your brain stop to work consciously. Every thing that you learned at the gym or in boulder will be forget to try to adapt to the new situation.
Inconsciously, you do thing that help you in the past. If keeping our mind clear is learned by beginner soon enough when they climb, they will adopt the reaction to keep there mind clear in a stressful situation.
As sport beginner learned that climbing is safe...knowing enough movement in bouldering and you will be safe, climb on bolt and you will be safe...etc. the subconscious mind will understand that climbing is safe and there is no danger. The risk of injury in this case is very high. Or people will think that trad climbing is dangerous and won't be able to climb safely.
The reaction of a person under stress is very complicated and will need solid question and answer to just understand the mechanic of thinking in trad. As people interfere just to say that they are good sport climber, those discussion can not be done.
Maybe if you told those climber that wrote to who you to avoid my post, more people who like trad climbing will be able to talk freely