If you look at cohousing and find that the membership doesn't reflect the general population and that it does reflect overwhelmingly a certain minority, then clearly specific groups are being served more than others. Pointing to a few exceptions doesn't prove that it isn't so. There's nothing necessarily wrong with serving a specific population, but we should acknowledge that that's what is happening. From a research point of view, this list is a biased forum for a discussion about how cohousing should be done. Most of the members here have been through the process a certain way.
People tend to think that the way they did it is the best way.
I'm a single mother who doesn't work. Choosing to work on cohousing means for me choosing to give my children less attention at times. There are those who criticize my choice. I wonder about it myself sometimes. If someone came along and simply developed a cohousing neighborhood all by herself and in order to make some money, I would move right in with no regrets and start working on relationships afterwards.