As a German, I would like to answer but I don't understand what you mean...? What is a "technican"? What is a "professional"? What "ceiling" are you talking about? And what EU rule?
Anyway, notwithstanding that I don't know what you are asking, the parent is pretty much right.
60,000 students without "Abitur", the traditional path, if you have job experience of "several years" (don't know what that means) you can still study.
Anyway, notwithstanding that I don't know what you are asking, the parent is pretty much right.