Metal doors are not really useful if all the houses are made of wood. Seriously.

I don't get it either, there was this fairytale about the big bad wolf, but I guess they must all think "hey at least it's better than straw", or something.

It's a really strange experience. You don't notice until you see the first solid stone house after two weeks of flimsy wooden cottages, it's a feeling, solid. "Stands like a house" is a saying in Dutch, meaning "solid as a rock", except in the USA it wouldn't make much sense :)

CA has building codes that address the probability of large earthquakes.

For a single story house, wood (if I understand) is a safer choice than other heavy materials which would crush you. In SF, there are different building codes as the buildings tend to be more vertical.

I'd guess that half the apartments in SF are in old wooden houses, with wood doors.

i'd say, i'd feel unsafe there even if such a story didn't happen to me... or, while there are houses of thin wood, maybe you are allowed to wear/keep a gun?

Keeping is not just allowed, its our natural right.

Wearing is, as well, but it's waiting on another SCOTUS decision for affirmation.

It's only your right until the next referendum to ban guns in SF, then you're in legal limbo until the state supreme court strikes it down. Rinse, wash, repeat every few years.

As for carrying in SF, only people named Feinstein are permitted to do that.

That sort of thing is not going to work much longer. Now that the 2nd has been incorporated against the states via McDonald, bans like that are outright illegal. I expect the first time a public servant is held personally liable for damages via a 1983 civil rights lawsuit we'll see an end to it pretty quickly.

There are a handful of cases which ought to end the question on carry in the next year, as well. Either Williams or Masciandaro may do so this year providing SCOTUS grants cert.