Think it's a conversation worth having. His website seems like quite a nice place to start for people new to socionics (although I think understanding DCNH you probably need to learn how to type first) but seen as the only other resources are stuff like wikisocion and this site (which is great but overwhelming when you first join) I think it's not a bad thing for people to take a look at Gulenko's site (the language is a bit more modern and inclusive than random old articles on wikisocion I feel).

I see what people are saying- there are a lot of people quite deep into their socionics studies so they know which theories they like or not and feel a responsibility to defend it almost.

I suppose he is also bringing socionics to the mainstream, which might worry people a little, as maybe they'll think it get too watered down/ the parts they don't like might get too popular.