When you take into consideration the science behind why pteros are so weak, you start to look at new ways of throwing them into battle, as a skirmisher.
Pteros had incredibly light skeletons, even the biggest ones. Quetzalcoatlus probably weighed around 150 pounds, fully grown. That seems odd for the largest pterosaur ever, but it had hollow bones. The arm and leg bones were reinforced with spongy tissue to act as shock absorbers when catapulting itself off the ground, but the rest of it was hollow bones. The skulls of most pterosaurs were so fragile, that many of them didn’t survive long enough to be fossilized.
Imagine in real life, a carnosaur vs. a Quetz. The Carnosaur bites down, and crushes the Quetz without any effort. It probably thought it bit into something that had no bones. Meanwhile, the Quetz lay crumpled on the ground like a torn paper kite.
It makes sense, because these were radically different creatures than dinosaurs, and the only real hope they had was to get off the ground and get enough altitude to avoid being someone’s dinner.