Pavel,
there is a choice - to give "unprepared" user to access whole backend, where this user can litarally blow everything apart, OR allow same user to create article+page from frontend. Also, you may notice that in my case users are NOT unprepared, because their access level is "publisher", which is actually second to admin.
Also - why is it possible TO EDIT pages from front end (and even actually create new ones - some useful tips on it are mentioned in docs and blog) - BUT impossible to do same thing just WITH joomla article integration?
I mean it's possible SEPARATELY to do two things - create new Joomla article, and SEPARATELY create new SP page. But not together. Is it really what called "integration"?