I agree wholeheartedly with Frank Dernie, most of what we say is just hearsay and conjecture. But, Frank was an engineer responsible for a car. We are just spectators trying to make conclusions based on shreds of information, we only really have pictures and video to go off of, so we do the best we can.
I'd rather make up some reason for a part to exist than to not even think about it at all. Also, Mechanical Engineering is a very visual science and if you educate yourself about certain design principles you can actually gleem alot of information by looking at pictures.
After all, does Frank Dernie let people take super hi-resolution photographs of each part on his car? I don't think so.
I love to love Senna.