If you think you're going to get rid of filler, you're in for a big disappointment:
https://en.wikipedia.org/wiki/Filler_(linguistics)
> In linguistics, a filler, filled pause, hesitation marker or planner is a sound or word that participants in a conversation use to signal that they are pausing to think but are not finished speaking.
[snip]
> Every conversation involves turn-taking, which means that whenever someone wants to speak and hears a pause, they do so. Pauses are commonly used to indicate that someone's turn has ended, which can create confusion when someone has not finished a thought but has paused to form a thought; in order to prevent this confusion, they will use a filler word such as um, er, or uh.[1][3] The use of a filler word indicates that the other person should continue listening instead of speaking.[4]
More to the point: Every language has them. Every language has always had them. Journalists are trained to edit them out of "verbatim" conversational speech unless they want the person they're quoting to come off like an imbecile, but longstanding journalistic convention doesn't mean filler is in any way recent.
We don't always speak without filler any more than we always speak in iambic pentameter.