I mean, shit, it's WAB. He's the kid with the nice new kickball that comes up and asks other kids if they wanna play. No shady shit, just I HAVE A COOL THING LET'S HAVE FUN
*ruffles wab's hair*
listen. LISTEN. Once it gets going it will absolutely turn back to discussion but right now everyone is at hnnnnnnnnnnNNNNNNNNNNNNNNNNNNGGGGGGGGGGGGGGGGG phase
It looks like they're focusing on his origin being purely his decent into madness and nothing to do with a sudden fall into a chemical vat or something.
A background based on an extreme and unique mental illness fits the "motivations are so fluid and ever changing you can't fully grasp his intent" concept pretty well I'd think.