It's not about price; it's hedging against the very real risk of petrol rationing and shortages. An EV can charge from any source, and in Europe a lot of power is sourced from non-oil sources
There are several oil companies/sources, but for electricity you are at mercy of those who control grid. Again, unless you have your own generation.
Which is cheap compared to even cheap Chinese cars before the tariffs are added: https://www.kaufland.de/product/512021383/?search_value=pv+c...