You seem to believe there's the optimal future, one and only. I see no reason to assume that various groups prefer the same future and agree on which trajectory is "optimal".

In basic terms, different people have different goals.

If you are making a place just to *talk*, well, that's not really a problem. Flamefests can be fun :-D On the other hand, if you actually want to "coordinate and collaborate" you'll need people to agree on the what the end goal will look like and kick out the dissidents.