EV batteries are big enough - and valuable enough - that nobody is going to just throw them out. As the quantity of unusable EV batteries grows large enough, the economy of scale will kick in making purchase & recycling of EV batteries viable.
Much of the EV technology stack has gone thru this process. Other industries do the same: something impractical becomes profitable on a large enough scale.
I think a lot of the ev plan is wishful.
Not saying it can’t happen, but will our power grid be made robust enough for them?
The ChiComs are building lots of coal power plants for this.