Agreed. I'm a personal finance nerd, and it felt like an epiphany when I discovered this a few years ago, because it's rarely discussed but seems so important. I max out our UM/UIM coverage now.
Side note: My wife is a stay-at-home mom and I've long wished for a disability insurance product that would cover the economic value that she provides, i.e. cover the cost of daycare / after-school care if she couldn't care for the kids. As far as I can tell, there's no such product for people who aren't wage earners. The closest thing I've found is UM/UIM coverage, since the most likely cause of disability is a car crash. Presumably it would pay for at least some of the other things beyond medical bills.
> Buy liability insurance when you rent a car.
Why do you say this instead of just relying on the liability coverage under your regular auto insurance?