I disagree that this has nothing to do with academia: immigration and visitor status for academics is not always the same as for other groups, and this is an issue that concerns many people. The OP specifically asks whether there are any exceptions/protections for academics: if these existed, it might mean that the answer to this question would differ from answers given to a more general audience.
I also disagree that this is "incredibly localized": many questions here concern policies or standards in individual countries; this one concerns developments in one country that affect individuals from multiple countries. In fact, users are frequently asked/encouraged to tag their questions with particular countries and to mention their country, type of institution, and field of study to go with their questions, because so many answers depend on that information.
I see you have edited your OP to mention bike-shedding: I assure you, for anyone who may be affected by the issues described in the post you reference, this is far, far from a trivial issue like building a bike shed. My first read of your post was that you might have some good points about the fluidity of the situation and the appropriateness of such questions on this site; now, I feel like you are entirely disconnected from the issues facing students and professors in academia, particularly those from other countries.
I also strongly disagree about your mention that this regards legal matters that haven't happened yet: people have already been held up in their source countries or detained at airports, there are reports of people who have been coerced to surrender their documents permanently by signing papers they did not fully understand.
Even though the original OP had some misconceptions about the current implementation of the executive order, there is indeed some immediately actionable advice that academics can use or provide to affected students that are wondering, specifically: there is currently no policy to deport students/professors who are in the US, but people from the affected countries may not be able to return if they do leave regardless of their immigration status. That information can lead to specific, practical advice for potentially affected members of the academic community.
I would also add that other posts related to policies of the current U.S. administration have been rejected by the community when they were too speculative, for example here. In comparison, the question you linked refers to an executive order that has already been issued.