just to add to the confussion
To (try to) answer, the question of the thread - because he is a stakeholder/important part of the system. All the data in the world are useless, if the driver does not "want" to use a setup or drive n a specific way. IMHO the psychological aspects of tuning for optimum car/driver performance are still underrepresented in most forms of motor sport.
Sure you can show to the driver what he does (wrong), but it´s not so easy to say/know exactly why he is doing,what he is doing.
There is no doubt in my mind, that good DAQ/Analysis is useful, neccessary, but should be used with care, as it is easy to "upset" a driver with a too ambitious or detailed analysis.
I think every race engineer can relate to this.
Know what you say, but don´t say all you know
Sometimes life would be easier if we could race without the driver - from a enginnering point of view.
the driver thinks: I could be quicker if I just could get my engineer to set-up the car in a specific way.
the engineer thinks: The car could be quicker, if I just could get my driver to drive it in a specific/better way
winning means often to find the best compromise between the two on a given day/track.
This is what makes race engineerig the art/challenge it is. Sure good DA and analysis helps a lot, but it still has/needs a human factor to go with it.
Why I do accept most of what speedsense says, I have to disagree with this statement:
>>>Add in DA, which records faster than human eyes or video frame rate, and records all of unseen things that video and people can't see from outside.<<<<
Super high speed video will record as quick or quicker as any DA system, and some things are
much easier to "see" and to understand when "seen" then to be measured or/and calculated.
Even at F1 level sometimes seeing is believing
I remember a friend of mine working for a F1 engine supplier telling me about the day they just used a super high speed video camera to visualize fuel flow pattern and mixture in a F1 airbox/intake. What they learned by this simple test/video just blow all there extensive and carefull CFD analysis complete out of the water.