This is because you’ve been living a very comfortable life with no real foreign threats thanks to US hegemony and the globalization it allowed. Due to other countries growing and wanting to have a say, this can’t be expected to continue going forward and so we have to think about things from a strategic perspective and not from a purely economic one.
We have more than enough significant allied countries in the Americas that we never have to worry about energy security ever again - in the sense of literally getting enough electricity to meet domestic demand.
If it is about getting low price energy, then integration with the global system is unavoidable, no matter how many domestic export bans you enact, etc. - you will be impacted by global energy prices.
