Oh, if anything, unless it’s in the last element, it’s easier to see paired items in the list ( ‘,’ -> next element; ’ and ’ -> still the same element, with ‘and’ inside). When it’s the last element, it’s indeed ambiguous. And then there’s /u/hakase 's comment:
“They went to Oregon with Betty, a maid, and a cook”, where Betty is the maid mentioned.
The issue comes in when you consider there are times you’d want to group things. Example:
I would like a toolbox with 4 drawers: Nuts and bolts, screws, washers and chisels.
Oh, if anything, unless it’s in the last element, it’s easier to see paired items in the list ( ‘,’ -> next element; ’ and ’ -> still the same element, with ‘and’ inside). When it’s the last element, it’s indeed ambiguous. And then there’s /u/hakase 's comment: