What do you think would happened if some ethnicities go extinct?

I heard that White people’s, and Japanese people’s populations are declining to extinction. If White people go extinct, then there will be no more White-owned TV shows, movies, video games, comic books, and new praise songs. Also, if Japanese people go extinct, then there will be no more Japanese TV drama shows, anime, video games, manga, and J-Pop music. Also, we will need Non-White people, and Non-Japanese people to make Action/Drama TV shows, anime, video games, manga, and Pop music.

What do you think would happened if some ethnicities go extinct?
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