College takes a long time. Most bachelor’s degrees run 4-5 years, and if you want a master’s or doctorate, plan for 6-10 years. That’s a huge chunk of time. (I realize there are shorter degrees and special programs, but these are fairly normal numbers.) In that time, a college student is likely not settled into a permanent dwelling (most live in dorms or shared apartments), probably isn’t working a career job, and may have relationships on hold (depending on distance, money, and the possibility of distraction from studies.) Of course, I am generalizing here, but bear with me.