Why shouldn't I delete the rig in blender? Feedback welcome

In this case, you don't need to do anything with the bones. Static items, including tables, are only assigned to one bone: transformBone. Static items aren't animated so they don't need a lot of bones. Things like beds and sofas are animated and do need several bones. So no, you don't need to alter the bones in this case. If you were, for instance, making something for a sim to wear that had longer arms than usual then you would need to move the bones to fit the long arms. 99.9999% of the time you don't need to touch, and by that I mean alter, the rig at all. At most, you might need to mess with weight paint but that's only for things that are animated.