The Bible is not a theory. But scientists can use information from the Bible to formulate theories with respect to physical evidence for a biblical cosmology, a young earth, the flood, the created kinds, etc. But the Bible itself is not a theory.
That will only give them information with respect to what happened, an perhaps an order of events, simply looking at the physical evidence doesn't tell you "why".
God is infallible, but men are not.
God doesn't write articles for creationist web sites, men do.
There is nothing in the Bible that says theories have to explain why, nor is that requirement enforced by science. It is a personal opinion submitted by the author of this article, and it appears to not have been well considered.