Tafsir (Explanation) of the sixth verse from chapter 45

Question: In the chapter Jathiya 45 verse 6, we find that it says (Those are the communications from Allah which We recite to you in truth, then in what announcement would they believe in after Allah and His communications)

My friend claims that this particular verse is a clear proof that we are in need of narrations.

How do I understand this verse and interpret it correctly?

Answer: The need to refer to the sunna is clearly established in the Quran from the following verses : (Whatever the Messenger gives you, take it and whatever he forbids you from, refrain from it) or (By Allah they will not truly believe until they make you the judge in all matters and find no resistance with what has been decided) and also (He speaks not from desire but only from that which is revealed to him)

If there was no need to refer to the sunna then there would’ve been no need of sending forth the Messenger and just suffice with revealing the Holy Quran.