- As others have pointed out, talent is not fungible. Just because you can program Yo, doesn't mean to can solve other issues. - If everyone is so convinced that Yo is such a dumb idea, do you really want the founder who's "capable" of doing something so stupid working on serious issues?
- What is worthwhile? If you view Yo as art (in the modern sense) it's pretty effective! Seems to have made the entire tech community collectively think. That's a hard thing to do. We don't mock the choices made by Banksy (who on the surface is a vandal)... Perhaps Yo will be a godsend to folks with severe disabilities, allowing them to simply communicate with others nearby easily and effectively. Or perhaps it's just fun. Why is that bad?
- Or maybe the whole thing fails and that's OK. Far more 'worthwhile' companies have failed.