To miss or not to miss classes? This is a problem.

Viktoria,  I would agree with you that students' education is their  problem and they should decide for themselves  to miss or not to miss classes. But how about your possible  future teaching profession that has two sides - you and your students. At the university classes you are getting the experiences of interacting with other people, discussing and debating different issues, learning how to start, support and complete real conversations. If you miss classes then you have to receive this kind of experiences in some other place, with some other people. Of course , the Internet now can give you such an experience but would it be a quality experince or just everyday small talk experience?
Another issue is class attendance policy in the Universities of the USA , for examle. If you miss more than two classes without a  strong excuse there  you may fail the course and will have to pay for it again How about this policy which is diffedrnt from what you mention speaking about European universites?