I have gripes about classes that have those kind of attendance policies, especially in higher level classes. A lot of my engineering classes towards the end were basically going over example homework problems, etc in class, where if you actually understood the material and already did the homework you basically didn't need to be there. Most professors were OK with this too, but there was always the occasional exception.
I get it if 100% of students were full time college students with nothing better to do, but in reality a lot of people need to work their way through college and being able to miss some classes means you can put in extra hours to graduate with less debt.
I even feel the same way about homework, to be honest. I've been in some classes that have a very high homework percentage or an arbitrary "Miss more than 2 homework assignments and each additional missed assignment is a grade letter off your average" type of thing. I think classes with high homework percentages are really just a way to prop things up for students who can't perform well on tests.
Now that I think about it, I think I actually did more homework in the classes that only had a 10% homework grade than the classes that had 20-30%. Because in the class with 10% homework the tests were REALLY hard and accounted for basically 90% of your grade.
There was a period of time where I dropped down to part-time status in school and explained to my professors early on that I was working full-time, and may have to miss a class occasionally if job responsibilities get in the way. One of my professors understood but I actually ended up having to drop out and later retake a humanities course because another Professor wouldn't look past the 3 absence rule.
Also, I don't buy the "College is way more work than high school" line from the OP's article unless you really went to either an underprivileged high school or didn't take advantage of everything that was offered to you (more plausible). Coming from an AP courseload in high school, I remember being so afraid of how college would be. Well I ended up testing out of some Freshman classes and working a lot of extra hours because it was a breeze. Sophomore year was moderately challenging but nothing I would say "10x harder than high school" about.
I think the OP's article author really just has the same old entitlement problem that's running rampant in society. They seem to be a victim of cognitive dissonance and trying to rationalize reasons why it's OK to skip the classes they aren't interested in, while at the same time passing judgement on those who may have to skip classes for legitimate reasons and/or feel better about themselves because they may not skip as much as other people.