I understand your points, and I want to attenuate this question (if you want to read the original, it's in the edit history)
I would like to see a shift away from one-shot closing by moderators in the GWT tag.
We don't have an extreme number of questions per day in our tag, and questions that may seem to be "not a real question" if you only know Java, may well be very clear questions to those who know and work with GWT on a daily basis. (Java is "kind of" a parent of GWT, but in reality, the relationship between Java and GWT is more complex than that).
I think it is important to improve the quality of questions in all tags, including the GWT tag, but we don't want to discourage the growing, but still comparatively small number of GWT newcomers by displaying "Not a real question" in bold letters. Rather, I'd like to be nice and add a comment (which I will do more often in the future) concerning the quality of the question. Bear in mind, that we aren't that many people, and a mod may be quicker with closing the question!
So if you have a feeling, that a question may need closing, then at most use the "5 votes required" closing mechanism - although this is already a big enough problem, since usually enough high-rep Java people come around to add their close vote, whereas there are not enough high-rep GWT people around to re-open the question.
Random example from just a few minutes ago (I understand, that this question is far from ideal): Write text on image