I think there's a lot of nuance, because the right move will depend on exactly what specific item we are talking about, combined with local factors, and this answer will vary from country to country. No country should be fully autarkic even for the defense supply chain, that much we agree on. That said, the principles that you've laid out, such as seeking redundancy, are universally good ones to follow for the non-autarkic parts of the supply chain.