At least it's less cringeworthy than the imitators who coin similar terms to describe invented regions that are used exclusively to market to tech companies (e.g. "Silicon Alley" in NYC, "Tech Valley" to describe eastern Upstate NY).
At least Silicon Alley is mildly clever. But yes, the idea a state that extends as far south as
Monterrey could possibly be called "Silicon Valley" is silly. I'm not Californian but the idea of splitting LA from SoCal makes me cringe, it seems so illogical.
The most "sensible" split would be a NoCal/SoCal split along the 36th parallel.