adding to the OP's: Ghazal is the romanization of the word غَزَل in Arabic, it almost means "flirting", and is a form of Poetry that dates to the Pre-Islamic time, usually a poem about love and romance.
The author seems to stress about the rules of "Ghazal" (and there is a lot more to it than just couplets rhyming the same) but these are just general poetic rules the Arabic poets used to adopt, and not exclusive to romantic poetry aka "Ghazal".
adding to this, besides VSO and SVO. Arabic can also write in OSV and OVS, not very popular in day-to-day use, but is often found in more traditional contexts.
What is more interesting is: Diacritical marks (aka vowels) in Arabic can completely alter what is subject and object!
They are a bit similar to strong types in programming, you can have one sentence, and by changing its marks/diacritics (specifically called short vowels), you change what gets to be subject or object.
This is why Arabic poetry (especially Pre-Isalmic) is very interesting in its expressivenss and structural complexity even in the shortest poems (reminds me of code-golfing).