Hmmmmmmmmmm. I remember buying my infant son trains, slot cars, and other fun stuff before he could crawl. Of course I had to set them up and make sure the toys worked.
I mean, you have to test it while the bowyer is alive, right? You need to make sure it will tune properly. And the string needs to be stretched in so it will be ready for him later. And this may take one, two, three, or a few hundred practice shots. Now, wouldn't it be a shame to miss your first shot of the season because you were used to this bow.
Go on, use the bow. Nobody will find out. You know you want to try it.
Your friend, Satan.