Going to college should not be considered moving out. They have moved out only after they have been done with college for at least a year. Until then they are trying to figure out life. Home is still your house, they are just not living there.
Once they are out of college and on their own though they need to figure out what to do about their stuff.
This is a difference in parenting approaches. For our kids, going to college, or in one case the military and another no college, was moving out. You have your approach, we had ours. They were perfectly capable and successful in figuring out their lives without flying back to the nest every summer.