[xyzzyz]

the tech. to recycle those future billion batteries doesn't really exist.

You're still missing the whole point, which is why you are being downvoted. The technology to recycle the future billion batteries exists today, and will improve in future. The issue here is that at a current price point it is simply not competitive compared to extracting raw lithium from ground. As the most accessible and profitable fields run out of the material, and as the demand for lithium grows, the price will go up, which might make the battery recycling economically viable.

Compare it to our current wood usage: the wood we use for furniture production is usually recyclable. You could take a wardrobe, disassemble it, and after some recutting and sanding you might use the wood for some other project. However, doing this in the end costs much more than using new materials, because collecting used furniture for recycling purposes, and labor needed to disassemble it and prepare wood for reuse is simply too much for it to be worth it, especially as it cannot be manufactured in a process as automated as making plywood, MDF, 2x4s or hardwood flooring is these days. Same with getting lithium from batteries: we could do it, but you'd have to pay extra for it.