Most new cars today come with roadside service if not AAA offers it very cheaply, Truth is most driving today is on modern highways. I have probably had one flat in the last 40 years, the first 40 years I had them weekly, so everyone knew how to patch a tube because they had too. Now everyone has a cell phone and help is only a call away. If you live in a 2nd amendment state you can wait safely, at least not undefended.
If I have a flat on a major expressway I would likely call roadside assistance. I’ve been fairly lucky over the years. I’ve been able to catch leaky tires in time to drive the car to a tire shop. I’ve had 2 or 3 flats over the years and they occurred while parked.