What nonsense Tannhauser. By your estimation, there is no difference then between your knowledge of psychology and that of a recently-minted psychologist who has had to read and study thousands of pages. Theoretical (book) knowledge is crucial in every single field. W/o the background, you don't have a clue.
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While you claim you have the right data,as in other people using statistical data your conclusions are not right.I do not care if you have all wikipedia in you if you are still saying false things,the data does not seem to help you much,I do not need to go far to show that your conclusions are false.
INTP are not good musicians?what a pure bullshit.While having more of one type in profession is likely to indicate something,it is does not necessary indicate the skill in the profession and due more likely to indicate will of intp type,that is not sure indication either.
The choosing of a job has many factors,many are dynamics,the type of people in each profession is dynamic,for example more female teachers today,does it say anything about male or female fitness to being a teacher?of course not.The following factors have influence:
1)who in the eyes of society is fitted to be a teacher.
2)wage
3)the will of the person,which influence the skill
4)the skill,which influence the will.
5)market factors,is it hard to become a teacher?,what kind of people are rejected because of acceptance to education institute and the job itself.How much it hard to get a more preferred job?
6)What kind of people are you going to work with,will I get along with the typical co workers of that profession?,If not they wouldn't even give you a position.
7)The prestige of the profession.
There are many things the can cause a person with intp type of thinking that is skilled and/or willed to be musician to not be.
1)This is not practical,it won't give me money(not wanting to risk).
2)people don't like intp type of music,which does not say INTP can not do good music,but that it will be harder to have success(or not,it can be advantage of having no competition in your niche)
3)better options(he don't want not that he can not)
4)hard time forming a band(social reasons)
With the intp intuition,a walking ideas factory,I see no reason for an intp to lack musical skills.
MTBI is a way of thinking,you can reach the same result with different ways of thinking.You do not have any data that say that INTP way of thinking is bad at something,that best you can do is predict,given the typical will of an intp his will to do something,but even with that you need to be carefull,as there can be a lot of reasons to do the same thing,one of them may fit an intp.
Psychology is science?really you think adding numbers to psychology and using a "scientific" method make it a science?self reported data is not reliable way to see how the brain works,statistical based research has high number of fail points,most times in the conclusion itself,other times in the way the data is gathered,this is no science,it does not have a consistent result needed for true science,10 different researchers all contradicting each other,and that is also in areas with more reliable data than psychologie like health.
Let's say it is science,science has its limits with things that you have little amount of data about,Einstein did not wait for data to conclude what he concluded.You do not have data on the huge numbers of neural networks in the brain,we still have a lot to learn about the brain,and you say this is science?
What you is like trying to predict the weather based on elementary school science knowledge.First you lack the current data,that is positions of clouds and more(the brain of the person),second you have very basic knowledge about weather(the brain).MTBI conclusions are on the level of,well there is a statistical data that shows that it is cold in the winter,by that I conclude it will be cold tomorrow.And with that data you predict it will rain tomorrow,"I am right,this is science,look here a chart,it has the shape of a cake".