OK, I concede.
But there are still rod companies and rod builders who place guides somewhere other than in line with or opposite the plane of the spline. There are many folks who have bought and use(d) Sage rods and Sage doesn' t spine the blank. They simply put the guides on the straightest plane of a rod section. And I don't think anyone would say Sage does not produce high performance rods, nor do I think that anyone would say that Sage rods do not track properly when cast despite not having the rod spined.
Personally, I think a spined rod is best; but this is only because I think a rod with the guides placed on or exactly opposite the spine puts just a little more power into the cast and tracks just a little straighter. However, I'm not sure if this is actually the case or not with our modern medium modulus graphite rods.