Well, sure; I agree.

Let me put it this way: it's one thing to say "some people like X, some people don't like X, and rationalists are more likely to consider what they actually want and how to achieve it without giving undue weight to social convention." It's a different thing to say "rational people like X, and someone's stance towards X is significant evidence of their rationality."

This community says the second thing rather unambiguously about X=cryonics and X=atheism. So when cryonics, atheism, and polyamory are grouped together, that seems like significant evidence that the second thing is also being said about X=polyamory.

So I figured it was worth clarifying.