Note that the plausible 2.c4 e5 3.dxe5?! dxe5 4.Qxd8+ Kxd8 scores less than 50% for White.
It's worth noting that the likely 2.c4 e5 3.dxe5?! dxe5 4.Qxd8+ Kxd8 results in a win less than 50% for White.