I’ve never heard of this guy but I’ve heard many of the same arguments. Seems to be a common sentiment from the Apple enthusiasts I’ve encountered. The number of times I’ve been told “if you were truly any good at X or smart you’d give up on free software and program for the iPhone” by some of these folks is quite staggering too. It’s like a cult. 
He has some galleries on his web site aside form the blog post you linked. While the photos in that gallery aren’t my style they seem to be more or less competently executed. Which makes his seeming lack of skill with a camera in the blog post even more puzzling. Unless I’m misunderstanding and the galleries are not his work but workshop attendees? Maybe he had an off day with the GFX? Like I said I’d never heard of the guy until now and know almost nothing about him.