Obviously yes.
Call it however you want and make the headcanons you prefer, but Enma itself has been highlighted more than once either by Hiyori praising its ability to cut Kaidou (instead of only her father's), Kaidou feeling Oden inside it, Zoro stating he needs to release more of its (not his own) power and Big Mom noticing it's not a normal sword.
Enma isn't just a training wheel. Just like any other relevant sword Zoro has owned, it adds to his own power. Oda hasn't explained what's exactly "Enma's power", but he has been clear as hell that there's indeed something that belongs to Enma and Enma alone; otherwise said characters wouldn't focus on it instead of its weilder.
In One Piece, swords are seen in an animistic way. Not only they choose their user but, as per Kawamatsu's words, the soul living in a katana makes the samurai strong; it's factual that you will be enabled to "destroy the enemies" thanks to the strong soul still living in the sword of a fallen warrior, and this is certainly not just metaphorical since swords have been depicted as "living things" since Loguetown.
Saying that Enma is just a sword and a mere training tool goes against everything established in this story. Whatever Oden left in Enma is making Zoro stronger, simple as that; stating the contrary goes against factual evidence in this story.