There's no disinformation here. The article is a pretty decent (though flawed) explainer of what is generally agreed to be the most likely rationale behind the tariffs.
The author is not adopting a pro-Trump position in doing so, anymore than a doctor explaining what's happening in your body is "pro-cancer." It's important to understand the actions of terrible people so we can better counter them.
OP's objections - and their mistaken belief that the article is adopting a pro-Trump stance - seem to centre on the fact that the author ascribes some kind of plan to the actions of the Trump administration, but this is not the same thing as suggesting that Trump himself is making some kind of masterful play. There's two flaws in OP's assumptions; first, that ascribing rationale to the actions of the administration is the same thing as ascribing rationale to the actions of Trump. Second, that describing how a plan can be broadly coherent and have some potential to succeed (on its own specific terms) is the same thing as saying that a plan is good or well thought out.
The article's chief failing is in not doing enough to u highlight both the obvious flaws in how this plan is being executed, and the obvious downsides it carries even if it succeeds.
I would recommend that OP, in particular, read this article from TPM; https://archive.is/Z164V
In addition to addressing the flaws I mentioned above with the Guardian article, it also does a very good job of addressing the dichotomy between Trump's obvious idiocy and the fact that his insane actions often do have the elements of some kind of strategy to them.
We all know there is a persistent desire, need, insistence on figuring out the plans behind Donald Trump’s seeming chaos. But that whole enterprise is flawed. There is no more plan here than a giant worm consuming everything in its path has. It eats and it moves forward. That’s all there is.... ... Now, given Trump’s great political power, he attracts to him people either who have ideas that seem similar to these impulses or for whom these impulses fit well into their theories or strategies... People like Bessent and Miran sidle up to Trump. And in the process of sidling up to him and gaining influence with him, his goals and actions do take on more shape and coherence, on the surface. So there is sort of a plan. Miran and Bessent have one. It has some impact on Trump. But really it’s just the same guy with the same impulses, with a desire for domination and who’s super hung up about trade deficits.
It's also worth checking out the video cited in the article, which breaks down the actual theory about Miran and Bessent's plan (which, to be clear they have openly described in essays and interviews; this isn't some 9/11 truther nonsense, it's just relaying their actual words); https://youtu.be/1ts5wJ6OfzA
In short, yes, it's possible for Trump to be an impulsive, idiot child who is still acting out grand schemes that, broadly, could have some chance at succeeding, at least in the short term, because that idiot child is surrounded by people who see him as a means to set their own long thought out schemes into motion. He is vessel for other people's projects, albeit a deeply unreliable one because his own stupidity, impulsiveness and mental decline make it very difficult for him to actually understand the plan or stick to the script.