I read the article. I'm sure he's correct as far as he goes—in that you can have plot (that is, a series of events) without conflict... I just don't really see how it's going to be an interesting series of events. Slice-of-life can, I suppose, be a little bit interesting if there's some novelty to it (seeing a slice of a kind of life you're not familiar with, like the life of someone in another culture). But reading a story that's ultimately no different than me living my own life... why would I bother?
I dunno, maybe it is just a cultural thing, but I think Westerners writing for Western audiences are going to have a lot of trouble gaining traction with stories that lack conflict.