Thank you for the time and expertise you have been generously shared.
In the thread at the apple.stackexchange.com/questions link in your answer I found a question similar to the one starting this thread. Unfortunately, all the answers were silent on the nuance of default behavior of column widths in Finder. Please accept my apology for asking about the default column widths in Finder in ambiguous terms.
Since the thread linked in your answer adds no information toward controlling the defauld width of columns in Finder, I would recommend that you consider deleting the link, to prevent others from going down that road.
The question starting this thread does not call for a general study of Finder Column widths. The question focuses on default column widths in Finder, particularly the Column View.