That may be true but in my case I found walking so boring that when I quit running I wouldn't do it.
But then I started playing golf and found that walking with a purpose, even if was hitting a ball with a stick, wasn't nearly so bad.
Just an idea for others that might be in the same non-walking mode.
That's why God made MP3 players. You can listen to books, music, sermons, etc. I listen to a sermon a day during my walk.
Do what you like. But one of the reasons I walk is not just for the fact that I believe that unless a person is ALREADY!!! in shape, they shouldn't be running. I think that when overweight people start running they do double damage by making their heart work a lot harder as well as putting excessive stress on their joints and tendons. But I also enjoy walking a lot more than when I used to run. I walk in state parks where I can also observe nature and climb hills if I choose.
I believe the average out of shape person will realize far greater benefits and a lot less damage to their body by brisk walking rather than running. But each to their own.