"If you rent, you can leave whenever the heck you want and then go live wherever the heck you want. "
You can do that when you own as well. You have to sell your house. After all you can't just get out of a lease whenever you want it goes according to a fixed time period. You have constraints as far as lease renewal, term and things like that. If you own you can decide at any point to sell (although certain times of the year are better obviously).
"I value not fundamentally worrying if there were to be an earthquake and this place would be destroyed. I"
Well first that is only a concern seriously in certain areas and second I wouldn't call that exactly something that is a common occurrence either. It's like saying "if I rent (edit fix) I don't have to worry about rebuilding if there is a fire".
"hey, I think I want to go try living in Portland, or just a different neighborhood here."
Ok so I understand your point now (but will leave the above comments for discussion). You actually are looking more to experience different things and not get tied down. Similar to the fact that some people would rather go to a different vacation spot each year rather than own a vacation home in the same place.
In that case an argument can be made that it makes sense to actually pay more to rent than to own because you are deriving some other benefit from not owning that is actually worth more (maybe that is what you are saying..)