[acqq]

It's not an "argument." The first sentence you quote is a statement of the fact. The theory containing dark matter and dark energy is the simplest that we have and to appreciate/understand that statement you would have to be able to actually write the formulas for different approaches and compare.

The author of the article actually did that: she provably wrote many, many papers filled with formulas attempting different approaches: it's her profession, she does that for living, and her statements represent something that she really knows.

Other (pseudo)arguments of yours are also the consequence of the lack of understanding of the basics of the topic which you attempt to comment.