The Genetic Necessity and Requirement to Metallergic Powers

The idea that because a person wasn't born metalborn that this piece of investiture is just vestigial and is like not an important part of your soul it's fine which obviously we see otherwise on nullthas. I also find it very interesting and wonder how comparable it is across other cosmere planets but this genetic necessity and requirement to metallergic powers is exactly the thing that thydecar is trying to work around yeah.