You add tariffs and you make steel production profitable in US. China subsidizes it's electric cars industry and they can sell EVs in Europe for half the price of European cars, literally killing the market.
You subsidize renewables heavily and you get windfarms that are unprofitable once subsidizing ends.
I'm sure that in a free market situation, your comment would make lot of sense. But this is not the case and you should read up a little.
I believe that one should aim to, in spite of their political views, try to see the big picture. Like why there's so little nuclear vs sun or wind.