It was a reminder that, if you want to run for a long time and you're growing older, you've really got to think hard about safe routes & how to stick to them.
For example, for this guy, if you're going to run 8 miles for 50 years, then safety would be the top concern - especially in your 70's. You can't do much better than a beach route. Soft surface, no cars, no way to screw up and fall and easily injure yourself: that scores like a 10 out of 10 for a running route. And 50 years of daily running can add up to a lot of risk. For example, 1 close call with a car every 1,000 runs = 18 close calls over 50 years.
I'd probably make the same choice in his position.