Markos, I would love to join you and start writing Attic daily, but I am afraid that my syntax would be so bad that either the subject would quickly turn to my syntax itself and the discussion would have to move to English, or that folks would ignore my bad syntax and leave me with the impression that I wasn't butchering things.
I think the idea behind using Ancient Greek actively, by writing and speaking it in the context of real communication, is that it gives you lots of practice in producing the basic forms. This causes you to internalize the endings much better than just passive reading will do. So, in turn, when you do read Greek, none of your psychic energy is spent on decoding the forms. This allows you to focus on vocab and syntax and makes reading easier.
This, anyway, is the theory. I am not a zealot on this issue. I think using Greek is helpful, but so are lots of other things. Tons of English-to-Greek exercises can accomplish the same thing. But using Greek for me is a little more fun than working through a composition text book.
As far as butchering syntax, we all do that. The goal is to do it a little less each day. Some people think that by using and reading bad Greek, your Greek will be harmed. That has not been my experience. I read the LXX regularly and there the Greek syntax is often butchered. I actually think you can only appreciate the subtleties of good Greek syntax by trying to produce your own. You notice much more stuff this way.
Randall Buth has said that to learn a language well, you have to make 30,000 mistakes. This, I can do.
But again, I appreciate your point of view. Most people who study Greek decide for whatever reasons that they do not want to use it as a real language, and I'm down with that.
ελπιζω οτι πολλην χαραν ἑξεις μανθανων την γλωσσαν Ελληνικην.
I am writing in Ancient Greek not because I know Greek well, but because I hope that it will improve my fluency in reading. I got the idea for this from Adrianus over on the Latin forum here at Textkit.