> Don't conflate Prop 13 and SB50.
The existence of Prop 13 has created a large class of voters opposed to rationalizing zoning laws - such as by SB50. It benefits these people to restrict housing supply, and Prop 13 ensures they don't pay the cost. Prop 13 is one of the root causes of all of California's housing supply issues.
The re-election rate of incumbents in California state senate districts approaches 100%. Getting into office in a district of a million people is about money, nothing else.
So the politician is getting re-elected even if they vote entirely contrary to their constituents' wishes? That's a bold claim.
The voters matter less than you think, largely because in these huge districts there will be an incredibly diverse range of opinions. Short of ordering troops to come in and murder people in broad daylight, getting such a huge number of people to coalesce around any single anything almost never happens.