Kel Varnsen I agree, although I would say that the impact of tariffs aren't economics pseudo science. The impact is very real and well documented for centuries all the way from the times of Imperial Preference and beyond.
There's no reality in which this creates any net winners. You're right that occasionally tariffs can be used to protect, say, a nascent industry for longer term benefits or a voting bloc but the cost is still borne by others in the economy in return.
And imposing blanket tariffs while also using it to threatening allies (that supply your food and energy needs) into giving up their sovereignty is open hostility.
Ultimately this isn't about good economic policy so there's no point about trying to find it. It's about power and control and the belief that the United States can bleed longer than just about any other country on earth. Trump's (probably correctly) surmised that most of his Western partners and their populations are uncomfortable with making difficult decisions or facing hardship and will drive them to the negotiating table.
Coming soon to Europe.