Ivdu:
We’re talking about the area between halacha and non-Torah related things. Like whether to do a pre-nup, for example (according to those who do not think it is an actual halachic problem, like my rebbeim for instance).
If a YU rosh yeshiva tell his students that it is a bad idea to sign the pre-nup–I don’t think they would listen to him. Nor if he says it is a good idea.