I’d be fully onboard with bi-generation, if instead they had explained it happening because of the Toymakers abilities to mess with the laws of physics. I’m surprised they didn’t go that route.
EDIT: I’ve been reading people talk about this idea on other social media platforms. I bet eventually RTD will confirm this. The bi-generation was a myth but the Toymakers powers did indeed bend the laws of the universe and make the myth a reality.