the idea is to improve and any input is useful, whether it be how important a particular corner is to the overall speed of a lap or the knack for that corner, a certain stays in and reading it afterwards or during the day helps.
gt4 is okay for the nurburgring for giving you a general idea of the corner sequence but does not brace you in any way for the changes of surface, bumps, cambers, gradients or compressions

It is barely recogniseable in reality.
gear selection or speeds are not covered in the guides as that is very car specific, but turn in points and clipping points are useful to know, although again these can vary a little by car and handling characteristics/driving style.
information cannot be harmful in any way and I know that it will be of benefit to me
before the ring trip in sept I devoured in-car video, guides, tips etc - they all helped give a feeling of confidence and control, thereby making more relaxed and i think safer
