What is not human is measuring the "rate of return" of what you learn exclusively in economic terms. Culture is a thing, although not always a very profitable one. There are people (particulars, governments, and even the UN) spending money to conserve languages. Also, I find quite extreme that you consider being able to talk with old and poor people a "waste of time", just because it won't help you to make a living.

A language is a tool, but it is also much more. In particular, it is much more than a tool to make money.

I don't know you, maybe you are a wonderful person. Maybe you could have done better things with your time than learning that language (I do not know how much time you invested or your possibilities to use it), but reading your comment made me feel bad.

>Also, I find quite extreme that you consider being able to talk with old and poor people a "waste of time", just because it won't help you to make a living.

I didn't mean to imply that language is only worthwhile if you make money from it. But time is a finite resource, and unless you really like learning different alphabets or something, there is no utility gained for 99.9% of people in learning one that no one else is going to use.

Learning how to speak a language is orders less time intensive than a reading and writing an alphabet. I'm glad I speak it fluently, and can converse with elders and poor people. But reading and writing it will never come into use for me.