Originally Posted by
ZeroBG82
I think it's two fold. One, because Steve, and through him super soldiers, kind of kick started the metahuman or enhanced revolution. No Avengers without Steve might be a little broad, particularly in the MCU, but that's more or less what I mean.
Second, because super soldiers can be replicated. Iron Man's armor is impressive, but Stark is pretty much the only guy in the world who can build one. Thor was born the way he was, but the Asgardians mostly keep to themselves. Wanda is the product of mad science (or at least was, prior to WandaVision) based on the scepter, and through it the Mind Stone, a one of a kind item in the universe.. Which has itself since been taken out of play.
But super soldiers? Anybody with the serum can make more. It's powers for the masses. Zemo hates all super-humans, and he'd almost certainly take a shot at somebody like Stark if he was still alive, or maybe even Banner if he thought he could make it count. I absolutely believe he'd murder Wanda in a heartbeat, particularly after Westview.