Politician giving speeches at some random gathering of industry types - isn't that SUPPOSED to be entertainment? It's not as if those speeches matter in any way

Politician giving speeches at some random gathering of industry types - isn't that SUPPOSED to be entertainment? It's not as if those speeches matter in any way? I think comedians do a similar thing, practicing their act until it seems spontaneous but every punchline hits. Why should politicians do their job part of "public speaking" in a different way? So what does "for real" mean? If a comedian manages to look spontaneous, yet every word and move has been practiced hundreds of times, is he for real?