Welcome to the board freshcrepes.
You say:
I'm not sure what a university education can give me except a certification confirming that I've learnt something. The information is more important than the certification to me at the moment. What do you think?
Unfortunately its what the employer thinks that counts. I have moved to a country where a diploma is crucial to holding many positions on the employment ladder. I have just passed a university degree at 50 years old.
Fortunately, my employer sponsored me. It is only a piece of paper, but as my boss said, so is a driving licence.