Why Zero Thrust?

The steering centric position of refreshed BC7 SUBARU Legacy LSi US model moves toward clockwise direction gradually being progressed with tire tread running in a new environment after wheel alignment and axle constructive geometry adjustment the day before yesterday. The ideal centric position would be fixed at unmovable point and the character would be same as another cars I'm keeping, sticky and seeking one point like performance resembles just like running on a straight rut road even on a flat ground surface. This specific steering reaction would be perceived as strange one for the driver who has no experience to drive a Zero Thrust car, but once experienced, nobody would desire to drive and control any other ordinary cars, because he or she would feel worse in a obliged condition to control unstable ones. Though, my explanations about this proposition is not enough, just , "Driving is believing!". This is why I insist on the concept. Even so, it is very interesting for me to narrow the various constructive tolerance in a machinery especially in a car.