system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are BBC produced nature documentaries like Planet Earth and Frozen Planet given a new narator for US audiences? Why not keep David Attenborough in the US version?
gpt
Like every TV network decision, it's based on what they think will appeal to the widest audience and thus make them the most money.

Maybe they think that having a British narrator will make the show be perceived as a "stuffy" documentary and therefore too boring. Maybe they just think that people will be more comfortable listening to a narrator who shares their accent.

They do the same thing in reverse with shows like Mythbusters, cutting out the American narrator and inserting a British one.