Just like universal healthcare, these systems only really work to their potential with full participation. If all (commuter cars at least) go electric, the incentive is then there for business/funded science to solve the related problems with generating electricity. We've already seen advances in leaps and bounds in recent years, and that's all with the drag of relatively small participation.

So the answer to your question is that they are currently less beneficial than they could be, but the potential of the platform is clear and superior to internal combustion engines. Emergency rooms triage patients based on severity of injuries - if a patient has a gunshot wound, a broken leg and signs of an early stage cancer, you start with the gunshot wound. People planted firmly in the position you represent with your question (not saying that's you, OP) are the ones that start to boast that medicine is a failure if the treatment for the gunshot wound doesn't also cure the cancer - it's the first and most important step towards the solution in that moment.