Your statement that using Ni instead of Si somehow means ENTJs never micromanage anybody is ridiculous.
First of all, Te is a bigger priority for ENTJs than Ni, and Te prefers to organize and delegate tasks sequentially in order to move things forward. If you have an employee who's not performing his job accurately, this could very well threaten the success of the entire project and thus require a micromanaging response. ENTJs may not enjoy micromanaging particular pieces as much as ESTJs, but they'll suck it up and do it when they've identified an incompetent team member whose ineptitude could threaten the success of the entire project.
Te doms often worry about the competence of the people they have to depend on and they're not above taking over a job if it becomes evident that the person it's assigned to is incompetent at it. I don't know where you got the erroneous idea that not being detail-oriented somehow exempts ENTJs from micromanaging. Servicing Te's goals can frequently lead ENTJs to this kind of behavior, in order to ensure the success of the larger goal.
1) "I don't do that so neither do any ENTJs."
2) "ENTJs don't like details so they never micromanage", which is ridiculous.
Ni may prefer focusing on the larger picture, but the more pronounced Te is well aware of the consequences of failure to execute smaller pieces of the plan in a timely and accurate fashion. Each piece of the structural unit needs to perform its proper function accurately, or the whole thing falls apart. That's basic Te credo.
And nobody said anything about "all ENTJs", btw.
Perhaps silenco doesn't have the intellectual capacity to realize using Ni instead of Si doesn't magically preclude ENTJs from showing micromanaging tendencies. It's a function of dominant Te, not Ni vs. Si.