A drill operation would be useful even if it didn't do it properly (raising bit to clear chips). It seems to me that if you specify a hole with a diameter that exactly matches the bit size, Easel should treat it as a drill. Instead, it just refuses to do it.
And, BTW, the same thing applies to ANY object with a width that matches the bit size. For example, an outline circle or rectangle meeting this criteria should be carved as a single pass (per depth). In this case it's mostly a matter of saving time: Why require a larger line width and thus multiple passes?