It is not as if YG is using aluminum drivers manufactured the same as lower end manufacturers of aluminum drivers.
Is anyone else producing them from a billet of aluminum? I don’t think so. They are stamped from aluminum sheets.
And it’s not as if their drivers are simple flat aluminum cones. The back of the cones use various raised areas designed to dampen resonances, standing waves, and add stiffness.
You can’t point to one specific technology, that you happen not to like, used in specific speakers, and claim that is a deficit that cannot be overcome.
Execution of the entire speaker system is much more important than any one technology used.
I also just did a pretty quick google search for reviews with measurements, and universally, they measure very well. Waterfall plots look very clean, especially in the midrange region.