No one stole anything. Two adults came to a mutually agreeable arrangement in which labour would be provided in exchange for training. Theft would at the least require that someone was deceived.

Unpaid internships are a vastly lesser evil than demanding a four year degree for an entry level job. Those four years could have been spent earning as well as learning. A six month unpaid internship is a hell of a lot cheaper than an associate’s degree, never mind a Bachelor’s.