No, that is untrue.  Political opinion columnists regularly employed by The Globe neither have nor require a bottom paragraph about their credentials.  Free lancers who are given a one time or occasional column do get a brief paragraph at the end introducing them to the readers.  

Margaret Wente as a decades long Globe writer and formerly editor of the ROB and the overall paper and the winner of numerous awards for her columns (e.g. the only back to back winner of the annual best public affairs column in a major market newspaper) needs no introduction to Globe or other readers who follow political opinion closely.

If you need to know more, do some cursory research such as reading her bio in the columnists roster section.

Now, do you have anything relevant to say about the points in the actual column?