In 1984, when I visited Santa Barbara for the first time, the Santa Barbara Channel was dotted with oil rigs.
In 1994, when I moved to Santa Barbara, the Santa Barbara Channel was dotted with oil rigs. My residence, in Montecito, was sufficiently elevated that, at night, I could see the rigs, their lights, and the islands beyond.
As the Wikipedia link above reports, the 1969 incident may have been of the seminal moments of the environmental movement. The fact remains that there has not been another accident approaching that severity, and for at least 30 years afterwards, drilling continued.
Don’t think, for one second, that the California coastline has not been drilled.