Typically if you are doing a solid element operation on an element to eliminate a portion of that element it is because you don't want that part of the element to exist. Therefore it would be ideal if the eliminated portion of a solid element did not have an effect on other elements that occupy the space of the removed portion. Example, if I remove a part of a wall with a roof and I want a beam to run through that now open space, the beam will have a gap where the removed wall was. The only way to fix this is to go in make the beam a material that has a higher priority than all parts of the wall. But that affects all elements with that material. it gets very complicated and cumbersome. It would be much more efficient if the removed portion of the wall acted as if it wasn't there and would have no effect on anything.
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