And I don't buy the argument that the presence of Ni in ENTJs completely disconnects them from micromanagement; unless you think that Te (or Fe) has absolutely nothing to do with the behavior, which is not a plausible position, then you are kind of forced to say that types with dom/aux Te/Fe have (to varying degrees within their own set, of course) a greater propensity for it than the majority that comprises the remaining, non dom/aux Te/Fe types. So even if you think that Te/Fe plays a miniscule part in micromanagement as compared to Si, you still have to admit that Te/Fe dom/aux types are more likely than, say, TiNe or FiNe types (with no extraverted judgment OR Si in the dom/aux position) to exhibit micromanaging behavior.
But I don't think that micromanaging, which is to inappropriately exert control over little details of a project/other people/etc., necessarily comes from Si. Sure, Si users naturally pay more attention to detail than others. But that in itself does not translate over to the desire to control the little details of something/someone. There are plenty of STJs that have never micromanaged (meaning that it is not inevitable that SiTe or SiFe causes micromanaging behavior.)
I think an extraverted judging function in a high position AND neurosis can make someone a micromanager, with or without Si. So yeah, a neurotic STJ will probably be a "worse" micromanager than a comparably neurotic ENTJ, but the ENTJs judging function (being Te) still makes it likely that they will manifest their neuroses in the form of micromanagement.
In less words, this: