I also live in so cal and I don't find that to be true UNLESS you need to be out real late. (Which might be a problem for some gigs)
Forgot what post said it be I want to mention again. The take away here is if you don't hvae good transportation be so damn good AND likeable that the bandleader insists and helps make it happen that you get transportation to the gigs .
That musician doesn't exist in my world.
There was one BL who had a gig in the DC area and would pick up (during rush hour ) and drop off the bassist in Baltimore. This was on a $100 gig. I found that fascinating.