Gas and Oil is also free like wind, solar and tides, you have to pay to extract it just in the same way you have to extract and convert wind and tides - the difference is its RENEWABLE. But one thing solar, wind and tide power isn't is free as the cost to build, convert, transfer (which is a challenge for offshore wind farms where power is lost in the transfer process) and then store the power all costs money just like burning stuff. Its a common misconception about power.
I have had many interesting chats about power (one of my good friends is an MD at an energy company) - the challenge for cars moving to EV at scale is the infrastructure and energy supply. Oil is non issue in terms of supplying energy to households (as it only accounts for 1% or something like that), the issue is moving cars away from petrol into using a different channel of power i.e. via the home. Of course in the UK demand over summer for energy drops as we warm up and we have a positive net use of energy, over winter we do not - we have a number of permanent energy lines into Europe where we run a deficit over the course of the year in terms of what we sell into Europe vs what we buy, if we had energy surplus this wouldn't be the case.
I am pretty sure no one on here thinks coal and gas are the future of energy production, as its not renewable, but the governments provision for this is not there. They are investing in wind but turbines are massively expensive (which is why billions of tax payers money subsidises energy companies to build them) and are highly volatile in their operation. It seems a no brainer to just build a tonne of renewable energy generators but its expensive and volatile in its output.