Think you missed the whole point of the article.

Firstly, video showed attack of the port aft section, Russian media showed pictures from the starboard side.

But Russia admits an incident took place. It doesn't matter if there was damage or not, Russia admitted the attack happened and it is where the attack happened that is interesting. Quite far from Ukraine to get sea drones in such a position, which means they could hit any Russian shipping anywhere in the Black Sea. That is a big deal even if this attack wasn't effective. Don't argue with me when even Russia said it happened.