> "Trump may have doomed us to an endless flood of celebrity politicians..."

We've had numerous celebrity politicians before Trump. Franken, Reagan, Arnold, Ventura, Springer, etc... The list continues[1] and it definitely wasn't Trump that was the first (although he holds the highest position of any of the other celebrity-actor-politicians, without having first held another political position).

[1] https://en.wikipedia.org/wiki/List_of_actor-politicians#USA

EDIT: Clarified my comment on Trump being the "first" celebrity-president