The thing you have to remember about apprenticeships is that they're still considered part of the education system. I don't know exactly how they are controlled as they didn't exist when I was in school, but I'd imagine entry into them is guided while you're at school and companies involved in them are pretty much selected and vetted by the government. Internships, on the other hand, are outside of the education system - they are about individuals begging companies for work and the company has all the cards, they can pick the rules. If they want to give you an unpaid internship managing facilities and then with no notice turn it into a waste of time moving files from one set of drawers to another, they can do that, because you're not on contract. Also, if you apply for an internship you're up against hundreds of other people all begging for the same job. Apprenticeships, on the other hand, have been stage-managed to guarantee that there are enough jobs around for everyone to get one.