Don't people travel? I have lived all over the country and currently love living in San Diego because I can visit areas of the country enjoying the seasons for a week at a time. A week of raking leaves, a week of shoveling and scraping windows. And even in LA, the mountains are less than an hour dive away. They can experience all 4 seasons in less than an hour drive.
I loved living in San Diego but nothing in the mountains compares to the lush spring, deep winter, hot summers with water temperatures warm enough to not wear a wetsuit, or crisp fall you get in other parts of the country you've undoubtedly visited.
Southern California is wonderful for a variety of reasons but the "I can drive to all 4 seasons" disregards some of the important details you don't get anywhere in semi-arid California weather, fauna, and ocean you have in the rest of the country.
I personally find California weather unbearably arid. When I travel for work etc. I miss the lush leafy vegetation and throbbing humid summer of my great lakes basin home...
