I mean, they absolutely did. I'm a strong environmentalist too, but we have to be honest about what California lawmakers were attempting to do when they created CARB. They tried to usurp regulatory power over US automobile standards from the Federal government, and knew they were fracturing the US auto market by doing so.
EPA already had similar regulatory change coming, but California jumped the gun to accrue market power to themselves, and it created regulatory chaos. In many cases the manufacturers had to make unique versions for the California market, driving costs up sharply. This has been a major contributor to the rise in new car costs in the US market, more than almost any other single issue.
And on top of that, this created BILLIONS of dollars in long term regulatory headaches at the Federal level, which our tax dollars had to pay for. And the Federal government has had to pass rules banning California from making any further unilateral emissions requirements on their own, in order to maintain a well regulated 50 state automotive market. It has taken about 15 years to normalize the regulations to achieve 50 state parity in the baseline, at massive cost and effort. If California had simply been willing to cooperate with the EPA and with other states these problems could have been avoided. And the expansion of a massive state agency (CARB) could have been avoided.