Yes of course. Haven't you ever watched a movie without audio and with subtitles turned on? It's quite easy to get the nuance. People's faces are incredibly expressive.
And nobody's at a distance, the cameras are always on either a medium or close-up shot when filming politicians speaking.
This is a deeply strange line of thought to follow. Do you think broadcasters would go to the trouble and expense if there was no value for people in it?
If subtitles were equal value or even “good enough”, they’d be used exclusively. That they aren’t should tell you something, and you repeatedly protesting that you are unable to comprehend the value doesn’t mean it isn’t there.
And nobody's at a distance, the cameras are always on either a medium or close-up shot when filming politicians speaking.