I will say this, I do not know any progressives personally that advocate it for their kids, I have however personally heard some of them say that it is up to the parents of other kids though, and I have personally heard parents (between working in the very progressive Old Town of Lansing, and a visit to Dow Gardens) praising their children for their choice to be to be their opposite gender and I’d imagine those would be the type of parents that would jump at the opportunity