Why can't Biden make intelligent responses to the media?

When it comes to the white house and press, every question the president takes is vetted by people in the white house with a reply that Biden does not even make. Does Biden not have the mental capacity to reply like the presidents of old where they did not need teleprompter. This is the Democrats president, an old man who is not fit for office. I feel sorry for Americans under Biden he's one useless tit.
Why can't Biden make intelligent responses to the media?
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