I'm pretty new to this so I can't speak for IndieWeb, but I wouldn't blame them. People who seek independence from the social silos are usually engineers or other web-aware people. It is only natural that they want to solve the problem with the knowledge they possess and tools they know - and I think it's fine. If you look back at how internet evolved, it was always like this - the geeks and nerds coming up with something fun but naturally hard to get into for the regular folk. But then it would get more and more approachable until it adopted for the said regular folk.

I think the IndieWeb is at this early stage. The adoption for a broader audience will come naturally (if this survives), but for now - let them cook