The spouse may indeed feel that way, but, again, if the person felt the need to get help, that person is trying to protect the spouse's identity as best he or she could, yes?
In a group of 80,000+, however, there is a greater chance that what you are going through has happened to at least one other person in that group, and they might have valuable life experience that they can share with you. The chances should be, although are not guaranteed to be, higher than the chances that the same thing may have happened to someone in, say, the 80 people in your family/close friends network. Or, as has been pointed out, you might not want your family to know that your spouse is going through something.
I had not expected this to turn into a referendum on going to Internet communities to get help. The fact is, people do it, and that suggests that they see some value in it, for whatever reason. If we start from that point, adding the point that they also see some value in doing so as anonymously as possible, I think that my plea for their privacy to be respected makes some sense. Maybe?