The reason Joe is popular is because he is just the average Joe. He doesn't know more or less than the average person & his opinions aren't extreme in either direction. I think, therefore, that looking at his opinions are an effective way of finding the pulse of the majority.

However, that's not the same as knowing whether the wind is changing. In many ways self-identification ideology is not mainstream, otherwise "gender reveal parties" would be considered some sort of political statement.

Since the 21st century, it's been difficult to make anything completely mainstream. The advent of social media has divided people up into a million niches. So perhaps the expectation that there will ever be a mainstream opinion on this or any other topic again is a futile & anachronistic one.

There is no overlap between the Rogan & trans circles. Only dude-bros seem to be fans of his. Fauxminists are the ones who need convincing.