Doug Miller writes:

Linseed, tung, etc.

Yes, some *are* drying oils, as I clearly acknowledged -- but most are
not, e.g. corn, soybean, canola, etc.

Of your examples, only canola is non-drying.

Corn (maize), soybean, safflower, sunflower, and some other vegetable oils
are semi-drying and do find use in paints. This is why they get gummy on
the outside of the bottle.

Drying vs non-drying is not a neat distinction. All of the above consist
of the same 5 fatty acids, just in different proportions. Two of those
five fatty acids are polyunsaturated and contribute drying properties. Raw
linseed oil typically contains 30 percent non-drying fatty acids: palmitic,
stearic, and oleic. Same constituents as found in beef or pork fat.