I wouldn't agree that analogies are bad, per se. as a sibling to my original comment pointed out, an analogy is essentially an informal isomorphism. this is a perfectly valid way of proving things in math, and it can often lead guide you to valid conclusions in mathematically grounded fields like physics.

>> C is similar to A in all ways that matter

> I have never seen this be determine-able in real life scenarios

this much I can agree on. when discussing human issues, analogies should be understood to be solely a rhetorical device, useful for persuading people, but not so much for getting to the truth of the matter.