While the reason is not stated, Occam's razor demands we look for the simplest explanation that ties together all actions of this administration.

And that seems to be dismantling the US as a military and technological superpower - a self-inflicted Morgenthau plan, if you will. We are left to speculate why a US government would want to dismantle the US, and who would benefit.

If you want to know, just look at the list of nations exempt from the current tariffs.

The reason is stated! The source article links to the request they sent to the court, explaining in detail why the EPA is doing this. Perhaps you think they’re not being honest, but Occam’s Razor doesn’t demand that we should spin grand unifying theories of government behavior in preference to evaluating the stated motivations of individual actions.