> switch completely to renewables (solar, maybe wind), EVs, green hydrogen/ammonia and synthetic fuels

You think other countries can't restrict those things? Restricting components related to those things will work just fine.

By the way, you can never switch completely to just renewables, it doesn't scale that well. They are simply too inefficient, unsecure, to "switch completely" in a country scale. Maybe just your house or some districts. You still need coal/gas/nuclear to maintain the power grid.

Oil is needed for many components inside stuff you mentioned. Oil is a must in military. If you want clean, abundant, cheap, secure energy, invest in nuclear.

Everything has tradeoffs. Diversify it.