Sure, but then every time the user does anything that might scroll the point off the screen, he has to remember to C-<SPC> C-<SPC> first. Installing a new habit that has to activate before such a wide range of editing operations can take a lot of time, during which the user is less productive because part of his attention is devoted to installing the new habit.
You're right. In practice I usually C-/ (undo) C-g / (redo) to get back to where I was; which is something you can do after you've lost your place in the file, but it assumes to previously made some change in that location.
