SFO offer:
Atlanta Boston Detroit Los Angeles Minneapolis JFK Salt Lake City and Seattle.
Literally only connections to the real Delta hubs
Delta operate ZERO International from SFO on own metal and other than LAX bugger all that isn’t a genuine hub
Not even a Connection presence apart from a few off peak Seattle rotations!
Indeed barely even a focus city !
LAX offer:
Add a few more hubs and flights back east and a selection of Connection flights to nowhere destinations .
They do offer services to Hawaii and across the Pacific and serve a few Latin American points as well .
Again very much focus city territory
The primary west coast hub is somewhere much further north in Seattle.
Whilst Minneapolis remains very much their main Hub west of Detroit by large margin
Any idea that Delta are a major player in California is simply erroneous .