Deletion of Downtown Los Angeles, Riverside, San Bernardino, and San Diego

Comment: per nom, and because this article's basic concept is flawed. It claims to list only the "main" central business districts in Southern California. But how do we decide what is and is not a "main" central business district without engaging in |original research and using arbitrary inclusion criteria? Why isn't Long Beach, California|Long Beach's downtown a "main central business district"? How about Irvine, California|Irvine? Warner Center, Los Angeles, California|Warner Center? All four of the cities discussed in this article are county seats, but why isn't Santa Ana, California|Santa Ana here? It's a large city with a distinct downtown, just like San Bernardino, Riverside and the rest. And why can't existing articles cover Southern California's downtowns adequately? Aside from the individual city articles, Greater Los Angeles Area and Southern California can easily cover this subject
Stance: delete
Cited policy: Wikipedia:No original research (WP:OR)