I don't understand this. Harvard Medical School has the same policy (or rather, none of the lectures are recorded).
Why are schools asking students to choose between the health of their peers vs their grades and their potential futures? Even responsible people can get exposed to COVID, and this would be punishing students that decide to not endanger their peers.
This is why unlimited sick days make sense in big tech companies: if you're sick, please don't spread it to everyone else in the office.