Does it make sense to live stream lectures publicly?

No, because those who watch them don't pay fees and don't contribute to education financially.

Yes, because education should be free and accessible to all.

Only for certain topics of public interest that should be promoted.

Yes, because they can contribute to the promotion of the lecturers, their home institutions and/or sponsors.

Live streaming publicly is very powerful but also difficult and dangerous, and teachers should not play with it at home.