Thank you so much for this post! Finally! I am so grateful someone posted an actual response to the OP.
I wasn't trying to pick a fight, and I'm still not. But when it's a virtual pile-on, you have to defend yourself. In any case, what type do you identify most closely with?
1. Correct. Jung's typology is psychodynamic, and not behavioral, but aptitude may or may not be correlated. Very tough to measure this in any case. Personally I think that aptitude and type are strongly related, but obviously interest/passion is more important.
2. Correct. There is no evidence that MBTI predicts job performance. As for career satisfaction, it's another story. I have several massive official MBTI datasets (422,000 and 3+ million) where the average worker is employed full-time, has been in his/her occupation for >= 2 years, and is largely satisfied (self-reported) with said occupation. Looking at the self-selection ratio (SSR) of a given type for a given occupation, it is then possible to draw some conclusions about which occupations any given type might find most satisfying. The SSR is the percentage of an occupational sample of a given type divided by the percentage of the general population that is that type. So for example, if an occupational sample of psychiatrists is 6% ENTP, and the general population is 3.2% ENTP, then the SSR would be 6/3.2 or ~1.88. This means that among psychiatrists, ENTPs are 1.88x more highly represented than expected. I don't think it's too far-fetched to then claim that psychiatry is a better fit in general for ENTPs, than say secretarial work, where the SSR is way, way below 1.0.
I think the last part of your post is spot-on. That said, the reason I started this thread in the first place is because I do believe that type determines to a large extent the suitability of any given occupation. Now in all the data I've seen, psychiatry for ENTPs has an SSR significantly higher than 1.0. Nevertheless, I am concerned that it might be too taxing in terms of dealing with other people's emotions. This is why I believe NF types are generally more numerous in this field. I wanted to get the input of other ENTPs specifically in this regard.