It has nothing to do with how "western" California is. It is because of the lack of good Non-Resident hunting oppurtunities. If you haven't noticed the MRS is based of off Non-Resident data.
You hit the nail on the head nvarcher ! We also don't have the number's to attain record book animals. You can only find Rocky Mtn. mule deer in a couple counties bordering Nv. and Or. .We have some nice bighorns taken. A lot of nice blacktail and bear taken. I just don't see the numbers to attract non res. hunters or the trophy quality. Maybe that's a good thing, don't know...?