Answer:
The reason is simple: it’s about the distinction between independence, dependence, and interdependence
Step-by-step explanation:
No one wants to depend on another country, because if something changes (e.g., the country chooses a new leader who doesn’t like other countries), then you may be in trouble.
On the other hand, no one can be truly independent, because we live in a complex, highly interconnected, interdependent world (or network) - and there’s nothing that we can do about it. 1000 years ago, societies were relatively independent. A community in the UK or USA could be relatively independent from a community in France. This is no longer the case. And anyone who thinks otherwise is living in the past. We need to appreciate that nation states in the 21st century are interdependent on each other. If the USA’s economy collapses, it will affect Europe and Asia, and vice versa, whether you like it or not.
But you don’t want to be completely dependent on one commodity or on one industry or on one nation, etc. You don’t want to put all your eggs in one basket, as the saying goes.