What are the reasons for using an egg whisk to cook scrambled eggs?
I think, like several questions on this site about scrambled eggs, this comes down to ones preferred curd size. There are many different ways of making scrambled eggs: at one extreme one heats very slowly, stirring gently with a spatula, and getting very large curds. Some people say this gives a sloppy texture, others prefer the smooth mouth feel. At the other extreme, one heats quickly and whisks, breaking up the curds entirely, and giving a fluffy mousse like texture.