This is so important! People like to be surprised by inciting incidents, not by the consequences of them. Showing a character dying and then not having them die is a good way to make the audience think you're lying when you're not.
Game of thrones, feels like a kid whimsically thought about a classical story then killed the main characters.
Everyone would normally think it's too immature for a story. Instead it became one of the most watched shows.
Except the "killing off characters" thing ,the show was well made.