Here’s the proper way to evaluate an analogy:
1) Ask this question: Does the person making the analogy between X and Y explain the respect in which he or she claims that X and Y are similar?
2) If not, ask the person to clarify that point.
3) If so, think about whether X and Y are indeed similar in the respect specified. If so, the analogy is legitimate. If not, the analogy fails.
4) Feel free at this point to pursue other questions about the analogy, e.g., whether even if legitimate it identifies an important similarity, or whether the analogy does the intellectual work its maker thinks it does.
Thank you for your time. We will now return to our regularly scheduled programming.