That is a valid point. But to give context, the discussion I refer to was about whether there are reasons to keep small languages alive. And my opponents argume

That is a valid point. But to give context, the discussion I refer to was about whether there are reasons to keep small languages alive. And my opponents argument was that losing a languagle loses also ways to think, whereas my argument was that language is to a very good approximation means to communicate, nothing more, nothing less. so there is no reason to keep small languages alive. (My native language is a relatively small language)