I don't think it will/can kill adoption, but it is slowing it. I'm pretty sure they have done the maths and set the kWh price to match fossil fuel costs as a "this is the most the market will pay". Your a captive market as there isn't near by competition and it's like they have colluded to set the price high.
You save so much on normal running costs, the cost of the odd long trips are easily swallowed. But it is blatantly profiteering and is slowing adaptation as people think that is how they will refuel.