You're right, an article that simply said "Donald Trump is the 45th President of the United States, a far-right-wing conspiracy nut, and a habitual liar" would be, while accurate, not particularly useful. But obviously that's not what it actually says. Let's take a look, shall we?

Here are the occurrences of the word "false" in Wikipedia's page on Trump, as of today, excluding where it's clearly quoting a claim by a third party without Wikipedia appearing to support that claim (e.g., "the suit [against Trump University] alleged that the company made false statements and defrauded consumers"). The words "lying" and "lie" do not appear in the body of the article.

> Trump has made many false or misleading statements during his campaign and presidency. The statements have been documented by fact-checkers, and the media have widely described the phenomenon as unprecedented in American politics.

This is in the intro paragraph. It's not locally cited, but it's a summary of the article to come; there's an exhaustively referenced section later.

>Journalist Jonathan Greenberg reported in April 2018 that Trump, using a pseudonym "John Barron", called him in 1984 to falsely assert that he owned "in excess of ninety percent" of the Trump family's business...

Citation for the conversation provided, and the fact in question is trivially checkable.

> Fact-checking organizations have denounced Trump for making a record number of false statements compared to other candidates.

Three citation links provided.

> At least four major publications... have pointed out lies or falsehoods in his campaign statements

Multiple citations provided, with a quote from the LATimes in the page body ("Never in modern presidential politics has a major candidate made false statements as routinely as Trump has.")

> Throughout his presidency, he has repeatedly and falsely characterized the economy as the best in American history.

Citation to WaPo fact-checker provided. That the economy in 2016-2018 is not in any way other than SPY highs the best in American history should not be controversial.

> As president, Trump has falsely claimed he saved the coverage of pre-existing conditions provided by ACA, while his administration declined to challenge a lawsuit that would eliminate it.

Citation link to Politifact provided. It would also have been an option to cite Trump's own Twitter feed here.

> Trump falsely asserted that his administration was merely following the law [in separating families at the border].

Many citations provided, with a (cited) explanation that Trump explicitly ended a previous policy which "had made exceptions for families with children."

> falsely claiming "Anybody that wants a test can get a test [for COVID-19]," even though availability of tests was severely limited.

Multiple citations provided for the statement having been made, and for it obviously being a lie.

> False statements

Section header, with a link to a separate (also extensively sourced) article.

> As president, Trump has frequently made false statements in public speeches and remarks.

Three citations to NYTimes and LATimes fact-checkers.

> His falsehoods have also become a distinctive part of his political identity.

Citation is to a New Yorker analysis article, which is a bit odd, but that article is itself well-sourced. In any case, this is not a particularly controversial statement - that the things he says are false is well established in context; that those statements are part of his identity is something he'd probably agree with.

> In September 2016, he acknowledged that Obama was born in the U.S. and falsely claimed the rumors had been started by Hillary Clinton during her 2008 presidential campaign.

Citation to NYTimes provided for the fact that he said it. No citation should be necessary for the fact that Hillary Clinton did not start the birther conspiracy theory (which has its own Wikipedia article).

> Many of the assertions he tweeted have been proven false.

This is in a brief section specifically about his Twitter use, so it's not a non-sequitor. Citations provided to NYTimes, WaPo, Chicago Tribune fact-checkers.

> Cohen said he had made the false statements on behalf of Trump

Citation provided, and this is in respect to statements that Cohen pled under oath to be lies.

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...and that's it. With one potential exception, every time that Wikipedia says in its own voice that Trump (or one of his associate) lies, it is well-sourced, specific, and pertinent. No need for concern trolling.

Wikipedia could of course instead say "Trump said X" without pointing out that X is ludicrously and dangerously false, but that would be a lie by omission, and Wikipedia would be less valuable as a source of information for it.