So far so good, then you wander off into the realm of BS.

There's no debate about the comparative virtues of cut vs. rolled threads in general, or specifically for spokes. Mechanically one major advantage of rolled threads is a closer ratio between the thread's root diameter and the shank diameter. This becomes a very significant difference when the thread depth is large compared to the thread diameter -- as in spokes.

The other advantage is speed of production. Probably 90% or more of all threaded fasteners are produced with rolled threads. In many cases this isn't due to mechanical or functional considerations, but because the speed of flat to round thread forming dies, which create a thread of any length in a few turns of the blank. Combined with cold heading, this produces fasteners with virtually zero scrap, and so is vastly more efficient --aka cheaper.

As for dies not running true, more male cow pattys. Once a die is established running true on a thread, it'll stay true indefinitely. The forces on dies are such that they tend to move towards trueness, rather than away from it. The same applies to taps.