Not every project is destined to succeed, for a variety of reasons. That't the cold reality of the world. The remedy is fail fast (i.e. assess interest and viability first and if it isn't there, do something else).

I'm sympathetic this time because I'm pretty sure your group really is sincere and trying to something meaningful. Most of the time I just downvote and move on, and I'm pretty sure other downvoters are more and more going to do the same, because engaging in a debate about every downvote (which, while now free, are still not rewarded in any way) is tedious.