European countries with free public universities also usually have private, paid colleges. In practice, those are where you really coast through.
In my observation those who do not engage with the material are more like to just drop out, rather than waste their money.
With a basic foundation in a topic, Wikipedia and open journals are much more valuable learning places than a lecture hall or study group. Those basic foundations should be built much earlier in primary education.
You can become a master programmer with no degree at all. Look at all the successful CEOs who dropped out.
Case in point, being if you've real value to offer. Absence of that degree or paper will never come in your way.
My earlier free of charge degree I worked hardish and it was taught at a much higher level.