It’s a pretty standard bandwidth/latency tradeoff in my view: email is high bandwidth (it’s in writing, you can re-read, etc.), whereas phone is low latency (several back-and-forth explanations can happen in seconds). Each has its place.
If social anxiety is a factor, that’s a perfectly valid, but separate, issue.
I’m too lazy to verify my hunch, but I’m guessing Texas is largely oil (exploiting natural resources), whereas California is largely intellectual output (tech, with some Hollywood and other sundry stuff), though California certainly does exploit its natural resources too (good farming conditions, some oil…).