When I wrote “As a result the number of Pauline epistles that are considered written by other authors vary from one, Hebrews, to all of them - including Galatians.”, it was after confirming that F. R. McGuire and  Robert Price dispute the Pauline authorship of Galatians. Price purports it was written by Marcion: R. M. Price, “The Pre-Nicene New Testament” (2006).

I think it is important to remember that folks like McGuire, Price, A. Q. Morton, and J. McLeman cannot get published by saying that Paul wrote all the Pauline epistles. No one wants to hear that 1+1 = 2 in academia.  Thus there is hardly any theory that does not have at least one “scholarly” book advocating for it.

I tend to take most of this with a grain of salt.