"...too ignorant or lazy to demand the precision of a document instead" Wow. What a statement. How about time constrained?
"I didn't have time to write you a short letter, so I wrote you a long one instead" -Mark Twain
A presentation is a sequence of slides, along with which comes many issues that prevent critical thought, such as the lack of random access, the lowered bar of evidence, and so on. You can convince anyone of anything as long as you craft your slide deck deviously to hide the lack of evidence and internal inconsistencies.
That is much harder with a document, even if it is short.
As the old aphorism goes: If you have the facts on your side, pound the facts. If you have the law on your side, pound the law. If you have neither on your side, pound the table.
Slides are ok as a backdrop for a talk, as long as that talk works as its own cohesive narrative. Slides are also ok as a last resort if it is what the audience demands. A sales meeting with people who expect slides. Or a pitch with investors too ignorant or lazy to demand the precision of a document instead.
But in general; a document will be much much better. This guide references Tufte's, whose own advice is to write docs.