IMO, analogies are fair game, and a useful tool for simplification. They can also work well for highlighting hypocrisy, when a supposedly universal rule is not being applied as widely as we thought it was.
Analogies are important to help understand the world and put things in context. Not only that, but analogies like this are commonly used in our legal system to both argue a point and justify a judicial decision. So I disagree that my comment is a derailment at all. X doesn't have to be exactly like Y for a comparison to be drawn, and I see little difference in the two.
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