What is the purpose of culture? It's a way of life. Arguably no culture has purpose, so do we force people to live in a different way?

Cultures and languages die out because they're slowly (or revolutionarily quickly!) replaced by another. It's not like there are people out there speaking no language because their mother tongue has died out.

And who gets to decide that a language has no purpose?

I don't like the way this argument goes.