Disagree. People will only pay what they feel the parks are worth. SoCal used to have many more theme parks than it does now but they all went out of business because guests didn't see the value of going.
However, look at the lowest prices available online.
KBF: 36.99
Cedar Point: 44.99
SFMM: 36.99 (3 day advance)
Six Flags Great America (Chicago): 39.99
And why do the Universal, Sea World, and
Legoland parks in FL cost more than the ones in CA?
And if COL is so important why is this year the first time ever that DLR passes have cost more than WDW passes? Did expenses in SoCal suddenly leapfrog over FL in the past year?