Now that's the wrong attitude to have! I know it seems like there's nothing in urban-suburban southern California, but if you look in the right places you'll find plenty. The trick is to be patient and spend a lot of time in a few good places; there are many times when I've thought a bug hunt would turn up nothing, but then I get lucky and find something under the last rock I flip.
When you say woodlands here are devoid of life, you're flat out wrong. There are countless critters living in the leaf litter, under bark, in or on dying trees, and even in the living trees. Like I said,just don't be discouraged and just spend more time out there.