How is it the moral lesson here? Is US even an ally? My country likes to l*ck Uncle Sam's bal*s. And just because Uncle Sam allows her to, she thinks he's an ally. We're a clueless, meek, nation. Perhaps the moral of the story should be to trust no one, depend on no one.
Self-sufficiency should be the goal. If we can produce for our own needs, if producers prefer the domestic market rather than the export market, perhaps a nation can sufficiently stand on its own feet. Maybe we can be the least affected of all these trade wars.
You are actually right on this here, the actual moral lesson we should be talking of is that we should not be too dependant on someone for something, especially when that thing in question is very important for your survival.
Yes it's very possible that you can't be self sufficient, because if that was possible, it would have been the best option, but since it's not possible, depending heavily on a single nation in a single geopolitical location is actually unwise because if you are restricted from acquiring something from there, it's going to be a major barrier to the growth of your economy, so I prefer that a nation should have at least up to six to ten suppliers of a certain goods or services that they can't produce themselves, so that if something like this happens in one of their suppliers, they can decide to do business only with those countries that didn't impose such tariff on them, because at the end of the day, everyone is looking for what is of interest to them, not the plight of what the other nations might go through because of a certain decisions taken.