For the reasons you state. And because they are pitifully poor and we are not.
No tariffs on poor countries is the best form of aid we can give them.
Other, industrialized, wealthy, countries: Different story indeed. We should increase tariffs on them, not to instigate a trade war but to restore some kind of fair balance.
But if you look at it, what Trump is doing is not really that malicious. He is just introducing some sign of life into our negotiations with other countries vis a vis trade.
It is overdue, and it will help us re-industrialize. It also is not so drastic as the press would have us all (worldwide) believe.
It's a tactic, but Trump can't just come out and say that; if he did, it wouldn't be a tactic.
He did the next best thing to revealing his strategy by having the Sec of the Treasury come out yesterday on the WH lawn and say, "Don't retaliate!", meaning, we will mitigate, soften, retreat, give way.
The market? It's as it has always been: half market forces, half emotional forces.
Regardless, it will work out fine.
Define "poor" in this context.
Perhaps "poor countries" slapping tariffs on US goods is part of the reason why they are poor.
WHAT "POOR" COUNTRIES?
So "poor countries" export goods to us, do they, and have outrageous tariffs on OUR exports to them, which supposedly their populace can NOT afford to buy?
Obviously, you have less than NO idea what you're talking about, do NOT understand this topic at all, so should refrain from commenting on it and other such topics!
Try reading the comments here, go do research, IF you are really interested in a topic, and for the love of GOD, stop virtue signaling!