Not the parent, but some simply prefer walking as an activity, and aren't concerned about optimizing how much distance is squeezed into a unit of time. A long, slow walk provides plenty of meaningful benefits that running and jogging may not.

Additionally, for people who experience joint issues, I'm sure the risks aren't at all overstated.

People aren't considering that the current thinking is that exercise might not be enough to make up for all the sitting that we do: http://www.nydailynews.com/life-style/health/regular-exercis...

By trying to walk a certain number of calories daily, you might be healthier.

That's definitely an important point to be mindful of.

I was also attempting to target those of us who simply enjoy the process and outcomes of a walk, and don't get the same benefits from running or jogging. When I run or jog, which is rare because I detest it (but love spending serious time lifting and training other ways), I'm always focused on my body, on pushing myself, on my breathing, etc.

When I walk, I can go forever and forget about my body. I get lost in thinking, reflecting, processing, etc. Walking is pure joy. Sure, it has positive physical effects. But I particularly seek the peace of mind that comes from going on walks. It's something I enjoy so much, I often pick my travel destinations based on how much walking I can do while exploring a new place. Walking has long been almost like meditation for me.

Because I recently put on a bit of weight. Every time I tried running my feet would hurt for a couple days.

The goal is to lose 25 pounds then try another C25k again.

Twenty years ago I could just go out 4 days a week and run a little farther every day. I could drop 20lbs in a few months.

Most people can walk 10 miles a day (you might get a big blister like me) without a problem.