Most people, and especially women, don't want to ride motrocyrcles as they are dangerous. Yes, that's also because cars and dangerous, but motorcycles, by design, mingle with cars.
But you have to learn to ride, and it demands more from the motorist than driving a car. And yes, there are dangers in form of car drivers, which you can do very little about to mitigate. But when motorcycles become more common, car drivers also learn to accommodate better to them. And I suspect a lot of the accident statistics come from young riders who haven't learnt to risk manage. There's a big difference riding at 35 compared to at 19.