Los Angeles is not a desert. Los Angeles has an enormous agriculture industry surrounding the area - farms don’t work well in a desert. LA is a type of savanna, specifically an oak savanna, compared to the high, dry desert of southern Nevada. It isn’t a minor climate shift - they are two radically different environments. The only thing that they share in common is getting hot in the summer.
Some folks like bottom performers. ( ͡° ͜ʖ ͡°)