Didn't assert otherwise, but autarky is held by some as an ideal. They are misguided.
Freedom is the ideal.
Why do you want restrictions on consumer choice?
Why should the government compel me to trade with you instead of leaving me free to trade my goods and services with whomever I want?
Allowing communist takeover of the means of production without and (especially) within the USA results in “restrictions on consumer choice”. There are far fewer choices available today than in the past, with the dearth of US-made goods and the draconian regulations imposed unconstitutionally by executive agencies. Empowering enemies by means of communistic “free trade” is going to result in economic siege of the USA; we’ve seen this in action in part already.
The communist goals as outlined in the Congressional record shows the “many roads to socialism” in action even in the 1950s.