Three parallel lines do not set up any plane perpendicular to them. Where did you learn your GD&T.
To create a plane you need three points and if all the points do not have a common coordinate (X,Y or Z) the plane will not be parallel to a certain axis.
The the tapered lug and seatss will center themselves to a point where they cannot overcome the contact friction anymore, so if the loci of two circles are off as the torque is applied the will never coincide. Youy are purely LUCKY if you get them all to center. If this were not true why on earth do you think wheel manufacturers would make pilots on hubs and also hubcentric rings for wheels. No one does anything for free or for sh!ts and giggles. Everything has a purpose!
LUG NUTS and/or STUDS are not toleranced (geometrically) accurately enough to provide the correct centering of a wheel to a hub. don't make to scan a hub print to prove it!
Dude, I design hubs and wheel bearings for trucks. I think I know.........
