It's like buying a plow; you use the plow to till your land and if a better plow exists (or, tractor) you go buy it.. or if your plow breaks you buy a new one.
But, we're in a situation where the plow can be taken away from us, arbitrarily, and the consequence is that people could possibly starve to death.
The situations are materially different in this aspect, but yes, trust breeds interdependence, which ironically is the point of the EU: if we all depend on each other then we won't go to war with each other anymore; seems to have worked. Longest peace in history.