It’s not a matter of upgrading lines - it’s a matter of being the scapegoat for all things related to fires in California. A dead line can’t start a fire. If California doesn’t want energized power lines running through dry areas, then they ought to cherish building power plants in the city where the load is.
This is the result of democrat government. If I were PG&E, I’d scuttle my fleet of generators and transmission lines and walk away. Leave the hippies in the dark and let them fend for themselves.
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In truth, much of the upper management of PG&E is Way wacko left.