Speaking as someone living in Italy sometimes it's worse than activism: it's pure laziness.
I (27 y/o) recently discovered that my sister's (16 y/0) History teacher hasn't done more than a week of lessons in the entire year: he comes in class, turn on the IWB (Interactive Whiteboard, the last unnecessary technology creeping in school), put on a video and let them watch while she do whatever she fancies.
During the entire year, out of a 400 page History textbook, they have done 39 pages. Now it is clear why there was so much opposition to the idea of online lessons: parents could finally see that their kids were not lying when they said that the teachers were incompetent.
The worst thing is that the teachers' mafia here refuse any kind of evaluation while teachers while touting the necessity of evaluation for the students: they are basically unfirable and devoid of any form of accountability.
I could stay entire evenings recalling events that should never happen in a normal school set[1], and that would be easily prevented with some quality control: they do not even need to be good teachers, just decent persons.
[1]One of my "teachers" used the fact the a dear friend of my classmate was killed in a car crash to mock her, the only satisfaction was having the entire class scream that she was a "dumb bitch": this in a very high-income, sophisticated, old money school.