Just imagine someday when you need to cut a super long material and the table of your laser cutter is not long enough, what can you do? Using a saw to cut the material into small pieces first? That would be a waste of time and might damage the material a lot.
Don’t tell me that your laser cutter does not have a pass through door design! All Thunder laser cutters has a pass through door design to deal with such case, you can learn how to use this function easily from this video.