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I consider the subtraction trick to be a hack similar to using illustrator. With the subtraction trick, your shape's boundary is the boundary of the shape you subtract from, as opposed to the shape you subtract out.

Subtracting is also more of a destructive action that makes it harder to modify your shape later. for example, if you wanted to enlarge one of the circles in your example, you'd have to re-do the entire thing.

I think it's another good workaround to be aware of, though, and I will probably use it in the meantime.