The reason nobody is doing it is because a collection of online videos and chat group is not an event. You go there to meet people, see the speakers in person and maybe have an informal chat over some beer. This is completely orthogonal to watching online videos alone at home.
But events are mostly expensive and waste of money as author notes. Few barely make a profit.
I don't think either matters. They don't need to make profit, usually being community events, and are as "wasteful" as going to a concert or meeting friends at the bar, except you also get to learn new stuff and expand your network.
But it does matter given it costs money to setup events. Also there are different classes of events.
#@theAuthor
In my country the cost of doing an event can fund 2 startups of 3 founders for 9 months, can build a maker-space, or introduce internet to a whole village.
A lot of people want to attend, but can't afford because they live in remote places, they don't come to get drinks take pictures, or network, they just want to learn.
This is an optimization sprouted from the local constraints of Morocco and similar African countries.
Your opinion is most welcome