In a way, oil reserves (even more so with precious metal reserves, for that matter) amount to prepping at the state level, don't they? I get why in an economy

In a way, oil reserves (even more so with precious metal reserves, for that matter) amount to prepping at the state level, don't they? I get why in an economy that to a large extent depends on petrol having such a reserve might alleviate some fear. However, I also don't want to imagine a situation where the US actually would have to use this reserve.