Trends change. Fashions change. Current wisdom changes.
God does not change. Nor does His word.
Guess you haven’t heard..God took all the liberals to Olive Garden and explained gay sex,raping children and murdering babies was okay...Those darn conservatives twisted His true views last 2,000 years...
I am great admirer of Albert Mohler, I find him to be an excellent thinker and writer. It's interesting that he defends his point be referring to Christianity's "historic and biblical" position.
To say "Historic and biblical" is to tap into the robust resources of "Scripture and Tradition."
I have seen him arguing, persuasively as well, on the basis of Natural Law, and in this, too, he is in the right.
A lot of the current hot-button "marriage, gender, sexuality, and family" questions are not addressed in Scripture and were hardly to be dreamed of in Biblical times
Yes, you can answer these with general reference to non-specific Biblical "values," not actually commanded nor enumerated in the text, but it's tricky: progressives support socialism, for instance, as a "biblical value." We may argue back, citing "values," but they'll feel justified in arguing back at you, citing "values" and throwing in Acts 6:32-33 to boot.
However, Scriptural Revelation + Christian historic positions (Tradition) + Natural Law (law that can be arrived at by reasoning from evidence and logic) makes a very strong case indeed.
Albert Mohler seems willing to go there. That's why he's such an interesting man to watch.