I always wonder why the Stripes (and similar) of the world don't build engineering outposts in LA. It seems like it would get them access to large pools of devs

I always wonder why the Stripes (and similar) of the world don't build engineering outposts in LA. It seems like it would get them access to large pools of devs in the same time zone and just a short flight from the main office in SF. The FAANG of the world do it, but any idea why it's not more common with midsize or large startups.