Well that's the whole problem isn't it?

It's not like the laws are simply "you can't make semiconductors here". The laws ban the harmful externalities of the process. The companies that want to make semiconductors don't want to find a way to make the processes less harmful: it's cheaper and easier to just go somewhere where they can pollute instead.

In many cases, California’s environmental regulations don’t make an earnest attempt to permit safe ways to do things.