Your explanation makes no sense. First, nobody thought that Trump would actually go through with the tariffs because it's an insane plan and that wiser people in the administration would restrain Trump. So the dollar started to devalue when people realized that "holy shit these tariffs might actually happen." The tariffs are way way bigger than anybody expected.
The entire goal of the tariffs were to weaken the dollar:
> The Mar-a-Lago Accord is a proposed economic and trade initiative of the Donald Trump administration during his second term. Named after Trump's Mar-a-Lago estate in Florida, the Accord is a blueprint for restructuring global trade and monetary relations. Its core goal is to devalue the dollar while preserving its role as the world reserve currency, a careful balancing act intended to avoid the contradictions described in the Triffin paradox.