I am currently reading the book "How Music Works" by David Byrne (Talking Heads). Off topic: it is a fascinating study about creating and perceiving music, highly recommended.
In the book, he talks about how music software is influencing music creation and draws parallels with what PowerPoint is doing to presentations:
"With the Microsoft presentation software PowerPoint , for example , you have to simplify your presentations so much that subtle nuances in the subjects being discussed often get edited out . These nuances are not forbidden , they’re not blocked , but including them tends to make for a less successful presentation . Likewise , that which is easy to bullet - point and simply visualize works better . That doesn’t mean it actually is better ; it means working in certain ways is simply easier than working in others ."
Byrne, David. How Music Works (p. 132). Crown/Archetype. Kindle Edition.
I agree that a good presentation irons out subtleties and nuances, but I would not call this dumbing down. A 10 minute presentation needs to get the investment pitch done with a very pragmatic objective of getting to the next stage of due diligence. In a sense you can compare it to the hit single with the simple hook that can create interest for the broader work of the artist.
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