A confusing description is with " the weight of the structure above … " as well.
If something is above the column, it creates some load in any case. That means it’s not possible a non load bearing case according to this description.
Another inaccuracy is with a “through compression”. Not necessarily all columns are affected by compressive forces. I agree that compression is the main impact to a column, but bending is quite a usual impact as well created by lateral forces (wind).
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