@Boomburst well not really. I assume when you say it's dumb you mean the fact that it pierces armor and targets when the bow doesn't, but there are a few reasons, that is a long bow primarily used in modern days for sport and demonstration, and compound bows and other shorter bows for hunting in comparison, and hoes were inefficient in the past, and now many large bows can be drawn by children and women with little strength.
The fact this girl could make this on her own time without needing a massive factory means it can be produced relatively easily for Nobunaga in his mind, and the short training and the ease of use is great. Archers struggle when being charged, same with muskets, when someone is dashing towards you with a spear or sword, the pressure mounts and many times you lose you cool, (especially due to the emphasis on swordplay being superior, bows were commoners weapons because it cost less, metal was expensive and nobody wants to give peasants swords and risk rebellion) and you might lose your grip as well, ultimately even if you do fire chances are it will mess up somehow if you arent a pro and collected.
But saying bows are more effective than crossbows is an issue, as arrows evolved and new designs came obviously they improved, but the historical accuracy is a bit iffy. Modern crossbows are far deadlier than any modern bows if I am honest, as they have 20,50, 150 trigger pulls, and pulling above 100 on a standard bow is pretty impressive (for a peasant or someone who doesn't have a decent level of strength)