The article is "not even wrong". Most of the argument just circles around an inconsistent definition of what "real world" means.

> Remember "imaginary numbers" from algebra? You could do funky stuff with them like take the square root of negative nine. Imaginary numbers are generally useless for the physical world that we experience. However, they turned out to be very useful in the field of electronics. More specifically, they had predictive power in the field of electronics. Using imaginary number math, one can predict behavior of electrons and the accuracy of such predictions in models can be measured.

Like here, I struggle to understand what the point is. Is predicting the behavior of electronics "useless for the physical world we experience"? And that's ignoring the author's apparent ignorance of all the other ways in which complex numbers are useful in the physical world besides taking negative numbers' square roots.