Most Arabic dialects are just that: dialects. They have no grammatical rules, nor a official written form for that matter, and are ultimately used for nothing more than speech.
Nonsense! All languages and dialects (not just prestige ones such as MSA or Standard English) have grammatical rules. If a language didn't have grammar, it would be impossible to express the distinction between "the dog bites the man" and "the man bites the dog".
Arabic speakers tend to diss their dialects and dismiss them as 'mere speech', but they're just as rich as any other language.
Besides, nobody would write an article in Egyptian Arabic or any other dialect for that matter because it'd simply be a waste of time.