I guess they have to grow wild somewhere, the pecan grow well in the areas away for the coast around here. The Macadamia Nut is native to the Sunshine Coast Australia and would probably grow well where you are. They are a tough nut to crack. You’d never do it with your teeth but they are sweet and no fiddling with the bitter pith like a pecan.
If you subscribe to the saying if it looks like an organ of the body it’s good for it then the pecan must be good for your brain.