Yes, one can only assume that GS believes that a column veener ~could~ be used for structure. And that a Complex Profile can be used instead.
Don't forget you can select all of your columns and choose Design> Complex Profiles> Capture Profile of Selection. Once you have set the skin priorities and stored the profile, you can use the Apply to Selection button to change all your columns at once.
While the columns will look correct, unfortunately they won't list correctly. That is, if you edit their settings, the name will show as Custom Priofile, not as the Profile's name.
Still don't understand why GS believes this is the way we'd like it to work.
Cheers,
Link.