I'm not convinced.
As far as I can tell? Reasonable programming, progressive overload and attention to form, will generally ensure that the entire back (along with all or most other muscle groups, connective tissues, and bones) is strengthened over time.
Unfortunately, I believe quite a few people getting into the lifting of weights don't know how to brace properly (and not just "the core", that is) - and they never find out, which means things will probably go one of two ways: 1) they give it up as a bad idea before they seriously injure themselves; or 2) they seriously injure themselves.
So for some people out there, I suppose those two guys have a point. For everyone else though, I don't believe they do.
41yo, 6', ~200lbs