Self-sufficiency is a myth. Even if you wanted to try and be energy independent, for the short and medium term (and maybe longer, who knows?) you will be dependent on China and all the baggage that they bring because of their dominance of rare earth mineral processing. Need a new solar panel? Don't make a certain country mad (whether that's your local Ayatollah or CCP official).
And that's just energy. What about pharmaceuticals? Financial markets? Who protects your shipping lanes? Who builds your semiconductors? Where do those factories get their energy from?
I support the diversity of energy sources because they all have strengths and weaknesses. We've got to figure out climate change. But we also can't have, even if you want to somehow "move off of oil" a single country run by lunatics who can decide whenever they don't get their way that they get to seize 20% of the global oil supply. We can't have China dominating rare earth processing either. For some others it may be a reliance on American military technology.
> Self-sufficiency is a myth
Self sufficiency exists on a spectrum. On the idiot end is autarky, which only works to keep a small group in power at the cost of national weakness. On the other end is a lack of stockpiles and domestic production that essentially negates sovereighty.
A country running a solar grid with EVs can withstand more economic shocks for longer than one importing oil. And while mining metals is geographically limited, making solar panels and batteries and cars is not.
I don't think they said it will give you self-sufficiency, rather that it removes one (important) dimension of dependency.
Oil is disposable, solar panels are not. If you have solar, and then piss off the CCP to the point where they attempt to stop you from acquiring more of it, you don't lose the solar you already have. Those solar panels will continue generating energy for years, if not decades, afterwards.
It's also important to note that the US also produces oil[0]. There are some quirks of the market and refineries that make it difficult to consume our own oil, but we could potentially build more domestic processing. The real problem is that pesky global market that puts costs on the state's ambitions for power. To put it bluntly, American oil is expensive. We can survive an oil crisis iff we are willing to pay astronomical prices at the pump; but if we are doing this assuming we can just enjoy cheap gas while the world burns, we are going to get a rude awakening.
Think about it this way: buying your energy in the form of oil is like exclusively using streaming services for your entertainment needs. It's cheap, easy, convenient - until the plug gets pulled and it suddenly stops being those things. Buying solar is like buying physical media - you have to pay up front and it's more of a hassle to get started, but it can't be turned off on a whim.
[0] It also used to produce rare earths, too. The mines closed down because they were too expensive to operate - not because rare earths are actually rare.
There is a huge difference between buying a solar panel once and having it generate energy for the next 30 years vs. buying a barrel of oil now and consuming it by next week.
It's the same difference as buying a house now and owning it until it collapses vs. renting a house and being at the mercy of your landlord, or buying a piece of shrink-wrapped software and using it for the next 18 years vs. renting a SaaS subscription that provides a different product next month.