In business, legal documents are edited in great detail. Exceptions here, clauses there, footnotes. It goes back and forth between parties. In this process that can take weeks, both sides get to know the text inside out. The dense text is actually a pretty useful format to communicate and avoid ambiguities.
Presentations are different. Most of the time, the audience sees the slides for the first time. Most of the time, they will see/internalise only part of the visual. Most of the time, the slide is a not a final legal document that will be signed right there and then.
So editing/designing slides can be a bit different. Distracting tangents, bubbles with exceptions, tiny footnotes. These details will not really register, and worse: confuse the audience. Editing a presentation is different from editing a contract.
Art: Pieter Brueghel the Younger, The Village Lawyer or The Tax Collector's Office, 1626