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Gas is definitely better than old school electric for cooking, but there's people that swear by the new induction stove tops and say they are at least equivalent to gas in the heat control you get.
Wouldn’t mandating better ventilation prevent the adverse health outcomes and be cheaper than replacing gas stoves? >

It would help, but people mostly don't even turn on the hoods they have.
We also want to stop using fossil fuels because of how they impact the climate. >

Not sure of numbers but a large number of hoods don't even actually vent outside they just blow right into the kitchen so changing that might be a good start >

That's how mine is, just vents through the microwave into the kitchen. I always open my windows when I cook with it however I'm not interested in switching to electric since gas is better (in my personal opinion) for cooking.