Why didn't slingshots become as reliable weapons as bows and arrows in the era of cold weapons?

Slingshot is very popular among the people. Historical records are all folk. It can't be used in war, naturally because of distance and injury. Think about the saying that in the face of battlefield confrontation, there is a difference of one arrow. Because this is the farthest distance from the bow and arrow ejection. Moreover, this distance is too great for a projectile without an arrow feather to fly at all. In addition, even if the projectile flies very high, the laws of physics are applied. It is still impossible to cause fatal injuries to people wearing armor. This is nothing compared with an arrow that can tear a wound apart. In this case, the slingshot naturally cannot go to the battlefield. But because of the great power of close range. It is a good weapon for the people to protect their homes. Later, with the crossbow, the slingshot was even deprived of its near position. It can only be used for sneak attack, and then there is a spring process. Under the operation of hidden weapons, the slingshot completely withdrew from the historical stage. Explain briefly why slingshots are not used in the battlefield. Bows and arrows on the battlefield were still used until the last century, because bows and arrows have great lethality and slingshots have little lethality. Slingshot may be effective for ragged thieves, but it is not harmful to armored soldiers. Bows and arrows have penetrating power, and it takes a lot of power to launch a projectile with the same weight, which is only possible after gunpowder appears. In Braveheart, Wallace didn't kill Hercules with pebbles, but knocked him unconscious. Even if there were firearms in the early days, the shells they fired were not as effective as bows and arrows, let alone slingshots. To sum up, the slingshot is less lethal, because the pulling distance is small, there is no sharp arrow, and it cannot penetrate the armor. In war, they are not as effective as blasting stones directly. Because there is a more powerful thing, riprap, and riprap has also been eliminated ...