The article says it's a myth that the leader gets there by competing with other wolves, not that it's a myth there is a leader, true. I think it's suggesting that many people have ideas about what an "alpha wolf" is that are mistaken. If someone doesn't have those ideas and "alpha wolf" doens't mean those things to them, then fine. The article doesn't get much into what the role of this dominant wolf is like, I suspect there are other popular but mistaken ideas there too as well.

Usually when I hear people talking about "alpha wolf" or similar, the idea is that the individual gets to this position by competing with other individuals, and then winning by using strength or aggression. It's that part the article is suggesting is a myth.

As you say, words are human inventions and people use them in different ways. If that's not the way you are using "alpha wolf", then article may not address how you are using it.