I think that it's easy to insist that others break out of their closet into the mainstream when you don't have to go to that person's job, community or be in a relationship with their spouse. That detachment is what I think makes comments of that sort possible. I don't think that people should be shamed into coming out.
However...
I refuse to believe it when people say they love their closet. The only time I love restriction is when it's around my waist. Seems to me like you've weighed the options and the risks outweigh the benefits. That's perfectly logical. Divers that go down into the waters in a cage do so because there are sharks in the water, not because shark cages are so awesome that you would rather stay in them than swim around free.
I think fear drives most people to stay in the closet, but it is a very understandable, human type of fear and I don't think it's fair to call people "gutless" who take the "better safe than sorry" approach.