There are movies that require fantasy and slightly more fantastical acting. Lines that are good for certain movies in real life circumstances would be absolutely unbelievable things to really say and you would look at these people like they're freaks for conversing that way. But somehow for certain styles of movies it works and it seems fine.
What the government has to do if it wants to govern for any length of time is it must appeal primarily to the third parties in the House of Commons to get them to support it.