Nothing is black and white you know. No decision is 100% good or 100% bad, we live in a sepectrum where some decisions may be less bad than others and that is the point.

Also current batteries will use cobalt or lithium, other options are either not efficient enough (like metal hydride or sulphuric acid batteries) or developed enough - solid state batteries, or LiFePo.

Also current BMW BEVs are still using lithium based batteries, whose mining pretty much is environmental disaster as a process.