Was refused to open bank account at KBC Brussels

Hi, as the title says the bank teller told me that, KBC Brussels is not the best option for me because I don’t want to do investment nor house insurance with them, so they would prefer not to to open an account for me, and I should go to other banks. I am an international student, so I do need a bank account in Belgium, so I don’t really understand his reasoning. My question is this a normal thing to say or the bank teller was just simply rude?