It is definitely possible to lecture in such a way that students gain no benefit from turning up. The classic way to do this is just click your way through a po

It is definitely possible to lecture in such a way that students gain no benefit from turning up. The classic way to do this is just click your way through a powerpoint, reading out the slides as you go along. That doesn't disprove the claim that it's possible to lecture in a way that students do benefit from turning up.