The suggestion that the authors of an article have ulterior motives is an extreme position to take, yes.
At no point did I ever say that it's a bad thing to hold that position, nor did I say it's an invalid position, nor did I say it's an incorrect position*. But in the society we live in, that position is pretty extreme
*Edit: as a general claim, and obviously only for trustworthy sources. For this particular article, it is a ridiculous position to take though.
Edit 2: I'm really confused what the point of this is. Are you defending that this article might reasonably be published with ulterior motives? Are you arguing over the semantics of the word "extreme"? Are you defending that the original comment reads like a sane interpretation of the article, even if flawed?