somewhat slangy Koine

Why, oh why, does World Magazine (7/31/07 p. 7) feel they have to add this qualifier (the part after the "but") to their review of Rick James' book, "Jesus Without Religion: What Did he Say? What Did He Do? What's the Point?"?:

"James makes plenty of pop culture references and writes in a sometimes-slangly style, but his views are orthodox, and he desires his readers to know Christ and embrace the gospel."

Don't hear what I'm NOT saying....

But don't they get that "makes pop culture references and a sometimes-slangly style" is a fantastically accurate definition of both the Bible and true orthodoxy; and anyone who desires their readers to know Christ and embrace the gospel" has no chpice but to "make pop culture references and (speak in ) a sometimes-slangly style"?