Nope. For any number of reasons they could put it off.
Not sure at 16/18 what to do. Worked instead then came back when matured a bit and knew their direction.
May have had to put it off because they were in care and dealing with shit.
May have had to put it off as they were a carer.
Might have gone back to get more qualifications. I returned to college at 25 for a second level 3 qualification to bolster what I had.
Might not have had the money to do. Education is free, materials, transport to and from isn’t.