I'm not aware of Sam's tweet. This being a tough space is an encouraging sign for a start-up. It was a founder of YC who encouraged start-ups to not avoid "schlep" business.

Edit: I realized that your reference to a tweet was in effect a questioning of the validity/purpose of Dais/Agora. I'd like to answer this. Unorganized debating and commenting is inefficient due to their delocalized nature. Dais allows the true values of debating to shine by creating appropriate space, and via structured guidance (see differentiated visuals compared to competitors).

By creating the first proper online space for debates, Dais gives birth to the possibility of entire cities, states, and nations being involved in issues (from temporary and local to far-reaching and international) at a level not observed since urbanization began, thus allowing unparalleled civic activism to flourish. This is the vision of Dais/Agora.

To add to my previous reply, it has in truth been sad to watch sites like CNN do away with their commenting sections. Now that I hear that Sam Altman - a person with considerable popular influence - has openly chastised debating, I am becoming worried about the presence of a trend.