Remember that they are selling them and that's a sales pitch.
As things have progressed over the years, adding more caster to the front for steering stability, steering effort goes up and with cross steering from a vega box, the force needed to turn the wheels increased to a level that the panard bar was/is a help to get the car to turn without twist on the shackles. lots of steering problems came about with the big/little tire combos, especially with errors introduced with narrow wheels severly offset to outside for big brake clearance. The line of the kingpin should intercect the middle of tire patch to pavement contact point.

