All of the examples you cite involve you being at home on your own property. I can't really see much of a need to baton wood on one's own property either, since there is almost always a better alternative. However, on a backpacking trip in the rain when all you have is a knife, it can become quite necessary to split wood for a fire. Of course, like you mentioned, you could always whittle the entire exterior of a log to reveal the dry center, but that is going to take a significantly longer amount of time. If you need to quickly start a fire with wet wood and all you have is a knife, I have to say batoning is probably the fastest way to get usable wood.
You also mentioned the issue of damaging your knife by batoning it. The only time I have ever come close to damaging a knife when batoning was when I tried to baton a Mora 760 through a 3.5" diameter log. This was certainly pushing the limits of the Mora. As I was batoning it it started to bend a significant amount. I just took it out of the wood, and there was no permanent damage. Other than that, I have beat the living hell out of some of my knives while batoning and I have never had any chipping, bending, edge deformation, or anything. With a .25" thick spine knife, especially with a good steel like SR101, the only thing that will be damaged while batoning is the baton itself, and of course the wood you are splitting.