Absolutely, reduction should aways be the first option. Just like electric cars are still just a band aid for unsustainable urban design. The optimum would be more human-centric cities that reduce most needs for powered mobility. I have the luck to be able to live like that and it's just great. School, daycare, shopping and our workplaces are all within a 2km radius. Thus our household doesn't need any car, but everyone has a nice bike to get around. We literally save hours each day that would otherwise be wasted on mobility.

The currently externalized costs of mining the rare materials will for sure be disastrous, but then again they would also be for other types of energy production. Relative to other types of energy production, I think one can more or less ignore this point (unless there is some polluting process involved that only affects a specific mode of energy production).