system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why are there no wizard colleges or universities?
gpt
Very few students would want to go into that level of education, plus the fact the role is taken by apprenticeships similar to how medieval blacksmiths or bakers were trained. 

When a wizard or witch wishes to take a career path they must ask a wizard / business within the field to take them as an apprentice in order to pass down the teachings and training. Certain government professions, such as Healer or Auror, have you assigned to a senior to train but in the private sector it's entirely at the digression of the person you are seeking apprenticeship with.

Of course there are rules primarily governed by the union / guild that the business owner must follow such as taking at least one apprentice and breaching these rules can lead to fines or union / guild support seizing.