Yet there is still a problem, and that is the apparent insistence on the implementation of specific technologies as implied by the guides and documentation.
Go read his entire post. There are all sorts of "problems" with the IndieWeb and Walker lays some of them out nicely. (Remember, I told you to subscribe to his site.) He mentions that the entire thing can be confusing to non-developers. Well, I am a developer and while the protocols themselves aren't impossible to grok if you spend some time reading or visiting the IndieWeb IRC chat, I have completely given up trying to support it because it is far too time consuming and nothing ever seems to work for every long.
I'm writing that out of frustration. Sorry. I know it can work. Look at Jeremy Keith's site. I'm so jealous. He's put tons of time into making so many of these things work. I want what he has. I simply have chosen not to spend nearly as much time as Jeremy has to get all of this stuff to stick together.
Here is just one example. I have webmention turned on for my site via the "official" WordPress plugin. It doesn't work. Colin Walker has linked to my site several times. And I to his. His webmentions have yet to show up on my site. Mine have yet to show up on his. And his site isn't the only site that has linked to me and the only way I've found out is via my Jetpack Stats (which I dislike having on but I keep it on for this very purpose). I'm certain that there is a logical reason webmentions aren't working but I don't feel like looking under the hood again (and again and again) to figure it out.
I'm not the type of person that needs everything to be easy. I don't mind some configuration here and there from time-to-time and if something is really worth the effort I'll even write the code myself. But supporting the IndieWeb (even just a single piece of it like Webmention) has exhausted this developer to the point of giving up.