I would consider other programming languages different from c/c++ because I don't want my capability to solve problems bonded to specific tools, this is the motivation I learnt other languages.
Evolution maybe, the animal becoming too specialized, in case of environmental changes, will face the extinction.
I'm looking for tools better able to solve specific problems. You can stick screws with an hammer, maybe it's faster but a screwdriver tool exists to better solve the problem and its evolution the electric screwdriver is the state-of-the art and probably the best choice. Now, having to deal with a limited resource, time, I have to choice what to learn seriously and this article doesn't help me to do a choice. Those choices also could influence my professional capabilities in the futures, because, you know, I do the programmer to live.
> just consider themselves programmers plain and simple
Plain and simple programmer is bullshit, IMHO. What do you write in your CV, "professional programmer plain and simple" :-) ? Oh, please, save your rhetoric.