He’s wrong.
I grew up in evangelical church circles, and abstinence was always faithfully preached for all unmarried people.
This article is the usual case of an over-excited recent Catholic convert. As is often the case, anyone who recently converts to something is a bit overexcitable about the perfect of his new path....
That wasn't what he said. In fact, he acknowledged your point: except for maintaining the caveat that sex is only for marriage.
The article has an arrogant put down tone to it.