meaning of sentence which contains make it
Hi. I have a question about the meaning of the sentence and usage of "make it".
Dictionary says that one of the meanings of "make it" is to be successful at something.
and gives an example
How did anyone so stupid make it to manager?
- Does this mean that how could people who are stupid become a manager?
if the meaning I wrote is correct, then "make it to the position of an occupation" means have that position?
Thank you in advance.

Question

meaning of sentence which contains make it
Hi. I have a question about the meaning of the sentence and usage of "make it".
Dictionary says that one of the meanings of "make it" is to be successful at something.
and gives an example
How did anyone so stupid make it to manager?
-> Does this mean that how could people who are stupid become a manager?
if the meaning I wrote is correct, then "make it to the position of an occupation" means have that position?
Thank you in advance.

Answer

There are shifts in meaning depending on the wording.

X made it big in real estate.  [X became rich from real estate deals.]

X made it as far as store manager, but not regional manager.  [X was promoted to store manager.]

Answer

The question "How did anyone so stupid make it to manager?" is specifically referring to somone. 
So Yes, the sentence implies the person has that position.