"Nothing to do" is a bit unapproachable. The rational way to butter toast is related to the rational way to conduct particle physics in really mindless links (such as that they both exist; they both use the term "rational way"). My gut reaction is that there is a better link between the two but have not thought about it in length.

I suppose the first path I would explore is that the same principles I use to discover irrationality can easily be applied in both circumstances. To use two things from your list I am familiar with, brewing coffee and driving a car certainly have parallels that can be abstracted so as to apply things to both activities.

Namely, to be rational in either I have to define what success and failure mean. Then a system of measuring success and failure needs to be determined. And yada yada. I can keep going but I think the point is simply this: "rationality" applies to both and learning how to be rational with a cup of coffee should help me become a rational driver.

This may be a bit too abstract to qualify a counter-point to the phrase "nothing to do with".

But what is there in common? Inherently mysterious human mind?