I think originally people lacked understanding that a strung bow and a whip can't operate the same way but they made them under the assumption that the ends of the bow would function like a cracking whip.
Archaeology paints a much different picture. As you pointed out, the earliest surviving bows (holmegaards) had stiff outer limbs. In all of Eurasia, these bows then get replaced by whip-tillered bows from the Corded Ware complex. Whip tillered bows and working tips then flourish for thousands of years of the age of classical civilization and cultural progress, until people start figuring out that you can strengthen stiff outer limbs without a weight penalty by laminating thin pieces of bone on to wood.
And in the Americas, the oldest paleo-eskimo bows likewise have stiff recurved outer limbs. These then evolve in to bending outer limb bows with stiff midlimbs and
static decurves, and the Indians down south freqently use whip tillers.
So basically, humanity got it right (in your mind) early on, then ditched the correct bows for the crappier ones. Twice, on two different continents.
Man, it's gotta be PTSD-inducing to realize that your ideas were rejected by all of humanity, twice, thousands of years before you were born. It's time to start smoking heroin.