Life is full of choices and opportunities. We all need to find where we belong. Sometimes it takes awhile. They may need to explore a variety of different options for their lives. It might not include the military.
Many adults still wonder what they are going to be when they grow up.
Regardless of their choice, they are still our kids. We need to support them as they discover adulthood. Sometimes student chose to leave. Civilians are usually gone within three days. They do have to pay for their uniforms and books, since they've gone over 30 days at this point, but since there is no tuition, they don't owe the government anything beyond that.