Presentation Effect 2: Rehearsed Failure

I don't know why I decided to post this here.... :/
…So, this is the (very late) Part 2 of Presentation Effect…
…Hopefully, at least some of you found it somewhat interesting… comments are welcomed (by that, I mean I NE3D MOAR COMM3N75!11!!!1seveneleven!#!11)
…Anyways, I was sitting through another presentation in-class one day, and this time, it was in a play format (with two people presenting). The play itself was quite entertaining and humourous; however, me being me, I won’t look into the strengths.
The thing about the play was that both of them said terms that otherwise shouldn’t be in a presentation, such as numerous “um”s and “ah”s, as well as some very casual figures of speech such as “like” (I’m, like, trying to, like, make, like, sense here, like yeah).
This would normally be quite fine, as plays aren’t speeches, and thus casual figures of speech may add effect and a tone to the play.
However, they were reading off a script.
Yes, a script.
A SCRIPT, with “um”s and “uh”s inside.
Sure, this would be quite fine too, if they rehearsed with the speech and presented without.
BUT THEY WERE PRESENTING FROM THE SPEECH.
Now, here’s what I don’t understand.
Sure, you could say that the added casual effects made the play more realistic, as it was actually a conversation (notice how I’m gradually degrading this)…
However, they were clearly reading it /directly off the speech/, clearly demonstrating the Presentation Effect (it didn’t sound casual at all!).
I just don’t understand why people would do something like that. It makes the presenter seem less professional, doesn’t make it sound casual at all, and just degrades it from the feel of a conversation (via the Presentation Effect).
I don’t know where I’m going with this; anybody care to elaborate further..? >_<
…Anyways, links.
(is now going to dentist ;-;)
Moe desu~!