Well, actually his rant about blender is exactly the same as some dude whom rants about how complicated C as a language is, and then wishes something like Python was available. Which would be a valid rant in the context of open-source 3D modelers. There are a bunch of smaller/obscure ones, that are all incomplete in some way, and then there is the big one, Blender. Blender is fabulous in many ways, it just has a way of doing it in a way that confuses many.
The same could be said of Gimp, except there are many alternatives that specialize in photo manipulation, or vector drawing, etc.